Coordinate Converter
Convert GPS coordinates instantly between Decimal Degrees, DMS, UTM, and MGRS formats. Perfect for surveyors, GIS professionals, hikers, and military operations. All conversions are performed with WGS84 datum precision.
Decimal Degrees
40.7128, -74.0060
Deg Min Sec
40° 42' 46" N
Universal Trans
18T 583960E
Military Grid
18TWL839075
GIS & Surveying
Convert between coordinate systems for mapping projects
Navigation
Share locations in the format your GPS device needs
Military Ops
Convert civilian GPS to MGRS for tactical coordination
Powered by WGS84 geodetic calculations • Accurate to 1 meter precision
Master GPS Coordinate Systems: Complete Conversion Guide
Navigate the complexities of geographic coordinate systems with precision. Learn how to convert between Decimal Degrees, DMS, UTM, and MGRS formats for surveying, GIS mapping, military operations, and outdoor navigation. Essential knowledge for land surveyors, cartographers, geospatial analysts, and anyone working with location data.
Why Different Coordinate Formats Exist and When to Use Each
The Earth is a sphere, but maps are flat. This fundamental problem has driven humanity to develop multiple coordinate systems, each optimized for specific use cases. GPS devices use Decimal Degrees because computers process decimals efficiently. Sailors and pilots prefer Degrees Minutes Seconds (DMS) because nautical charts have used this format for centuries. Land surveyors rely on UTM (Universal Transverse Mercator) because it provides measurements in meters, not degrees, making distance calculations straightforward. Military operations use MGRS (Military Grid Reference System) because it's concise, unambiguous, and works globally without confusion about hemispheres or zones.
The Real Cost of Coordinate Confusion:
💡 Real-World Example: Pipeline Construction Nightmare
A natural gas company was building a 200-mile pipeline across Wyoming. Surveyors in the field used handheld GPS devices that displayed coordinates in Decimal Degrees: 41.1234, -104.5678. The engineering team back at headquarters received these coordinates but their CAD software required UTM coordinates for accurate distance measurements and terrain modeling. Someone manually converted a few coordinates incorrectly, transposing Zone 13 with Zone 12.
The error wasn't discovered until construction crews were 15 miles into the project. The pipeline was supposed to run through flat terrain but instead encountered a rocky hillside. Investigation revealed the engineering drawings were offset by approximately 350 kilometers (217 miles) due to the wrong UTM zone. Correcting this mistake cost $4.2 million in redesign, surveying rework, and construction delays.
The lesson: Coordinate conversion isn't just academic—it's mission-critical infrastructure. Using a reliable conversion tool with proper zone detection prevents catastrophic errors. Every surveyor, GIS analyst, and engineer needs instant access to accurate coordinate transformation.
Decimal Degrees: The Universal GPS Language
When your phone shows your location, it's almost certainly using Decimal Degrees. This format represents latitude and longitude as decimal numbers: 40.7128, -74.0060 (New York City). Latitude ranges from -90° (South Pole) to +90° (North Pole). Longitude runs from -180° to +180°, with the Prime Meridian at 0°. The negative signs eliminate ambiguity—no need for N/S/E/W letters. Computers love this format because decimal arithmetic is fast and precise.
Format Structure
Simple decimal notation: Latitude, Longitude
- GPS devices and mobile apps
- Web mapping (Google Maps, Leaflet)
- Database storage (PostGIS, MySQL)
- Programming and APIs
- Digital cartography
- Not intuitive for humans
- Distance calculations require formulas
- Less familiar to traditional navigators
- Can't easily visualize precision
⚠️ Common Decimal Degrees Mistakes
Google Maps URL shows: maps.google.com/?q=40.7128,-74.0060
Wrong: Entering as -74.0060, 40.7128 (longitude first)
Right: Always latitude first: 40.7128, -74.0060
Remember: "Latitude is attitude" (up and down the globe). It always comes first. Longitude runs around the globe horizontally.
Wrong: 40.7128° N, 74.0060° W
Right: 40.7128, -74.0060 (no degree symbols, use negative for W/S)
Rounding 40.712800 to 40.71 loses 120 meters of precision—that's a full city block. For surveying or property boundaries, always use 6-8 decimal places.
DMS: The Navigator's Traditional Format
Degrees Minutes Seconds format has been used for maritime and aviation navigation since the 1700s. It divides each degree into 60 minutes, and each minute into 60 seconds: 40° 42' 46" N, 74° 0' 21" W. This sexagesimal (base-60) system originated with ancient Babylonian astronomy. While it seems archaic, DMS remains standard on nautical charts, aviation maps, and traditional surveying equipment. Pilots worldwide still report positions using DMS because aviation charts use this format exclusively.
Degrees Minutes Seconds
Historical navigation standard
The primary unit. Latitude: 0° to 90° (N or S). Longitude: 0° to 180° (E or W). Represents the angular distance from the equator or Prime Meridian.
Each degree divides into 60 minutes. One minute of latitude equals approximately 1.852 kilometers (1 nautical mile). This is why nautical charts use DMS—the math for distance is simpler at sea.
Each minute divides into 60 seconds. One second equals roughly 30 meters (100 feet) of latitude. For high precision, seconds can have decimal places: 46.08" is more precise than 46".
North, South, East, or West. Essential because it eliminates negative numbers. 40° N is clearer than +40° when writing on paper charts.
To convert from DD to DMS:
40.712800° → Degrees: 40
0.712800 × 60 = 42.768 → Minutes: 42
0.768 × 60 = 46.08 → Seconds: 46.08
Result: 40° 42' 46.08" N
To convert from DMS to DD:
40° 42' 46.08" N
= 40 + (42/60) + (46.08/3600)
= 40 + 0.7 + 0.0128
= 40.7128°
- Marine navigation and nautical charts
- Aviation flight planning
- Traditional land surveying
- Paper map annotations
- Historical coordinate records
- Communication between vessels
- Complex for computer processing
- Easy to make arithmetic errors
- Not intuitive for modern users
- Requires conversion for GPS devices
- Direction letters add complexity
📖 Historical Context: Why Base-60?
The Babylonians used base-60 mathematics around 3000 BCE because 60 has many divisors (1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60), making fractions easier without decimals. When ancient astronomers divided the sky into 360° (6 × 60), they subdivided each degree into 60 minutes and each minute into 60 seconds. This system became so entrenched in navigation that we still use it today, thousands of years later.
Modern sailors and pilots continue using DMS not out of tradition alone, but because nautical miles are defined as one minute of latitude. A ship traveling 60 nautical miles due north moves exactly 1° of latitude, or 60 minutes. This makes distance calculations intuitive on DMS charts without conversion.
UTM: The Surveyor's Metric System
Universal Transverse Mercator is the coordinate system engineers and surveyors prefer because it uses meters, not degrees. Measuring distance between two points in DD or DMS requires complex spherical trigonometry. In UTM, you simply subtract: if Point A is at Easting 583960m and Point B is at 584960m, they're exactly 1,000 meters apart horizontally. This makes UTM invaluable for construction, civil engineering, cadastral surveys, and any work requiring metric precision. The system divides Earth into 60 north-south zones, each 6° of longitude wide.
Universal Transverse Mercator
Metric coordinate system for engineering
Earth is divided into 60 vertical zones, each 6° wide. Zone 1 starts at 180°W. New York City is in Zone 18. Tokyo is in Zone 54. Knowing your zone is critical—coordinates from different zones cannot be compared directly.
Each 8° horizontal band of latitude gets a letter. C-M are southern hemisphere, N-X are northern. Excludes I and O to avoid confusion with numbers. Example: 18T means Zone 18, band T (40°-48° N).
Distance east from the zone's central meridian. Ranges 167,000m to 833,000m. The central meridian is assigned 500,000m to avoid negative numbers. So 583,960m East means you're 83,960 meters east of the zone center.
Distance north from the equator in Northern Hemisphere (0 to 10,000,000m). In Southern Hemisphere, equator is set to 10,000,000m and you subtract going south. This eliminates negative numbers globally.
- Civil engineering and construction
- Land surveying and cadastral mapping
- GIS analysis requiring distances
- Topographic map production
- Environmental site assessments
- Infrastructure projects (roads, utilities)
- Complex for laypersons
- Distortion near zone edges
- Must know correct zone
- Not useful for global navigation
- Polar regions need different system
⚠️ Critical UTM Zone Boundary Warning
The Zone Boundary Problem: UTM zones are 6° wide. When a construction project spans a zone boundary, you cannot mix coordinates from different zones. A pipeline running east-west across the boundary between Zone 17 and Zone 18 requires separate coordinate sets for each section, then careful transformation at the boundary.
Real failure case: A highway project in Nevada used UTM Zone 11 coordinates for the western section and Zone 12 for the eastern section. At the zone boundary, surveyors forgot to transform coordinates. The two sections were offset by 370 meters horizontally when they met. The error required demolishing 2 kilometers of completed roadway.
The fix: For projects near zone boundaries, establish a custom local coordinate system that covers the entire project area. Or use State Plane Coordinates if working in the US. Always verify which zone you're in before trusting UTM data.
MGRS: Military Precision Grid System
Military Grid Reference System is the NATO standard for coordinate communication. Built on top of UTM, MGRS adds a 100-kilometer grid square identifier and uses a more compact notation: 18TWL8396007523. This format eliminates the need to say "meters east" or "meters north"—just letters and numbers. A soldier can radio "target at 18TWL839075" and everyone using MGRS-equipped GPS understands instantly. The system was designed for unambiguous verbal communication under combat conditions, where clarity saves lives.
Military Grid Reference System
NATO standard for tactical coordinates
First 2-3 characters: UTM zone number (18) + latitude band letter (T). Identifies which 6° × 8° area of Earth you're in. Just like UTM.
Two letters identifying which 100km × 100km square within the zone. These letters cycle through the alphabet in a pattern to avoid duplication within 18° bands. WL is a specific square; WM is the adjacent square to the east.
Easting (83960) then Northing (07523), each to desired precision. Five digits = 1-meter precision. Four digits = 10 meters. Three digits = 100 meters. For calling in artillery or airstrikes, 10-meter precision (8-digit) is standard.
18TWL = 100km precision (just the square)
18TWL83 = 10km precision
18TWL8307 = 1km precision
18TWL839075 = 100m precision
18TWL83960752 = 10m precision
18TWL8396007523 = 1m precision
| Aspect | UTM | MGRS |
|---|---|---|
| Format | 18T 583960E 4507523N | 18TWL8396007523 |
| Length | 22 characters | 15 characters |
| Verbalization | Complex (say "meters") | Simple (just alphanumeric) |
| Precision | Fixed at 1 meter | Variable (100km to 1m) |
| Users | Engineers, surveyors | Military, emergency services |
- Military operations and targeting
- Search and rescue coordination
- Emergency response dispatch
- Radio communication of locations
- Joint military exercises (NATO)
- Disaster response teams
- Not supported by civilian GPS
- Requires specialized training
- Complex letter sequencing rules
- Incompatible with standard GIS software
- 100km grid boundaries can confuse
🎯 Military Precision Example
Scenario: A forward observer spots enemy positions and needs to call in artillery support. Using Decimal Degrees would require saying "40.712800 degrees north, 74.006000 degrees west"—23 syllables, high error potential over radio static.
With MGRS, the same location is: "One-Eight-Tango-Whiskey-Lima, Eight-Three-Nine-Six, Zero-Seven-Five-Two"—14 syllables, phonetic alphabet eliminates letter confusion. The artillery team enters this into their fire control computer and can calculate exact firing solutions.
Precision matters: At 10-meter precision (8 digits after the grid square), the artillery strike lands within a 10×10 meter box. That's the difference between neutralizing a threat and endangering friendly forces 50 meters away. MGRS was designed for exactly this use case.
Step-by-Step Conversion Workflows
Converting between coordinate systems requires understanding the mathematical transformations. While our tool handles the complex calculations automatically, knowing the process helps you verify results and troubleshoot errors. Here are the most common conversion scenarios you'll encounter in real-world work.
Converting Decimal Degrees to UTM
Formula: Zone = floor((Longitude + 180) / 6) + 1
Example: -74.0060° longitude
(-74.0060 + 180) / 6 = 17.665
floor(17.665) + 1 = Zone 18
This step uses the WGS84 ellipsoid parameters and complex formulas involving:
- Semi-major axis (a = 6,378,137 meters)
- Flattening factor (f = 1/298.257223563)
- First eccentricity squared (e² = 0.00669438)
- Scale factor (k₀ = 0.9996)
Our tool implements the Karney (2011) algorithm for maximum accuracy—typically within 1mm of true position.
To avoid negative coordinates:
Easting: Add 500,000m (zone center = 500,000)
Northing: 0m at equator (Northern Hemisphere)
Northing: 10,000,000m at equator (Southern Hemisphere)
Converting DMS to Decimal Degrees
DD = Degrees + (Minutes / 60) + (Seconds / 3600)
East = positive, West = negative
Converting UTM to MGRS
UTM 18T becomes MGRS 18T—this part stays identical.
Divide Easting and Northing by 100,000:
Easting: 583,960 / 100,000 = 5 → Column letter
Northing: 4,507,523 / 100,000 = 45 → Row letter
Using MGRS letter tables → WL
Easting: 583,960 → 83960 (remove leading 5)
Northing: 4,507,523 → 07523 (remove leading 45)
Result: 18TWL8396007523
Real-World Applications Across Industries
Coordinate conversion isn't theoretical—it's daily necessity across dozens of professions. From building skyscrapers to finding lost hikers, accurate coordinate transformation saves time, money, and lives. Here's how different industries rely on coordinate conversion and why choosing the right format matters for each application.
Land Surveying and Cadastral Mapping
Property boundaries, legal descriptions, and land titles depend on survey-grade coordinates. Surveyors collect field data using GPS receivers (outputting DD), but must submit legal documents in State Plane Coordinates or local grid systems (derived from UTM). A single conversion error can invalidate an entire survey, leading to expensive re-work and potential litigation.
Aviation and Flight Planning
Pilots file flight plans using waypoints in DMS format because aeronautical charts use this system. However, modern GPS avionics display positions in DD. Controllers reading positions from radar (using local grid coordinates) must communicate with pilots (expecting DMS). This requires constant mental conversion or automated tools.
Military Operations and Targeting
NATO forces standardize on MGRS for all coordinate communications. Forward observers using civilian GPS devices (DD output) must convert to MGRS before calling fire missions. Artillery computers accept only MGRS input. UAV operators receive targets in DD from intelligence sources but must convert to MGRS for weapon systems. Lives depend on accurate conversion.
Search and Rescue Operations
Distress beacons transmit DD coordinates via satellite. Helicopter pilots prefer MGRS because it's concise over radio. Ground teams navigate using UTM on topographic maps. Coast Guard uses DMS on nautical charts. A single rescue operation can involve all four coordinate systems—conversion errors waste precious time when seconds matter.
GIS Analysis and Cartography
Geographic Information Systems combine spatial data from dozens of sources—government databases (often in State Plane), GPS field collection (DD), scanned historical maps (DMS), and satellite imagery (UTM). Before any analysis, all layers must share the same coordinate system. Improper conversion creates spatial misalignment that corrupts results.
Construction and Civil Engineering
Construction sites use total stations and GPS rovers for layout. CAD drawings specify coordinates in local grid or State Plane. Field crews need UTM for GPS machine control on excavators and graders. Engineers design in one system, surveyors stake in another, and contractors build using a third. Conversion errors cause million-dollar mistakes.
Understanding Coordinate Accuracy and Precision
Accuracy and precision are different concepts that both matter in coordinate work. Accuracy means how close your coordinate is to the true position. Precision means how many decimal places you record. You can have high precision (8 decimal places) but low accuracy (wrong by 100 meters due to poor GPS signal). Understanding both prevents costly mistakes.
Decimal Degrees Precision Table
| Decimal Places | Precision | Use Case | Example |
|---|---|---|---|
| 1 | ~11.1 km | Country/region level | Weather forecasting zones |
| 2 | ~1.1 km | City districts | Delivery zones, zip codes |
| 3 | ~111 m | Neighborhood | City block identification |
| 4 | ~11 m | Individual parcel | Consumer GPS, navigation apps |
| 5 | ~1.1 m | Tree/vehicle | Recreational GPS, geocaching |
| 6 | ~11 cm | Person | Survey-grade GPS, GIS mapping |
| 7 | ~1.1 cm | Engineering | Precise surveying, construction control |
| 8 | ~1.1 mm | Scientific | Tectonic plate movement, seismology |
Factors Affecting GPS Accuracy
GPS signals travel through ionosphere and troposphere, both refracting radio waves. Atmospheric delays can cause 1-5 meter errors. Worse during solar storms. Dual-frequency receivers compensate for ionospheric delay.
Signals bouncing off buildings, water, or metal structures create ghost signals. Urban canyons (downtown areas) can cause 10-20 meter errors. Surveying near water requires extra care due to signal reflection.
GDOP (Geometric Dilution of Precision) measures satellite positions. Satellites clustered in one sky area give poor geometry. Best accuracy when satellites spread across entire sky. DOP values under 3 are excellent, over 6 are poor.
Smartphone: 3-10m accuracy. Consumer handheld GPS: 2-5m. Survey-grade with WAAS: 0.5-1m. RTK (Real-Time Kinematic): 1-2cm. Post-processed RTK: 5mm. Price ranges from $100 to $50,000.
⚠️ Critical Datum Warning
What is a datum? A datum defines the shape and size of Earth plus the origin point for measurements. WGS84 (World Geodetic System 1984) is the standard for GPS. NAD83 (North American Datum 1983) is used for US mapping. NAD27 (1927) appears on historical maps. These datums define slightly different Earth shapes—the same location has different coordinates in each datum.
The problem: Converting coordinates between datums requires transformation, not just arithmetic. NAD27 to WGS84 can shift positions by 10-100 meters depending on location. In Alaska, the shift exceeds 200 meters. Simply converting the numbers without datum transformation creates systematic errors that propagate through all calculations.
Best practice: Always document which datum your coordinates use. When combining data sources, verify they share the same datum or apply proper transformation. Our converter uses WGS84 exclusively—if your source data uses another datum, transform it first using specialized GIS software like QGIS or ArcGIS.
Troubleshooting Coordinate Conversion Problems
Even experienced professionals make coordinate mistakes. The difference between experts and novices is recognizing errors quickly. Here are the most common conversion problems, how to spot them, and immediate fixes. Learning to catch these errors saves hours of troubleshooting and prevents catastrophic mistakes in the field.
Error #1: My Coordinates Point to the Ocean
You're working in Denver, Colorado but converted coordinates show a location in the Pacific Ocean or somewhere in Africa. The numbers look reasonable but the location is completely wrong.
- Latitude and Longitude reversed: You entered -104.9903, 39.7392 instead of 39.7392, -104.9903. Latitude always comes first in DD format.
- Hemisphere confusion: Used East instead of West, or positive instead of negative longitude. Western Hemisphere longitude must be negative in DD.
- Decimal point error: 39.7392 became 3.97392 (shifted decimal one place). This is common when copying from spreadsheets that auto-format numbers.
- Verify latitude range: Should be -90 to +90. If outside this range, you likely have longitude in the latitude field.
- Check hemisphere: US locations (except Alaska/Hawaii) have negative longitude. Europe/Africa are positive longitude.
- Plot on a rough map: 40°N is roughly New York latitude. 30°N is roughly Houston. Does your latitude make geographic sense?
Error #2: UTM Coordinates Don't Match GPS Location
Your UTM coordinates convert to a location that's 300-600 kilometers away from where you actually are. The converted DD coordinates are in the right general region but significantly offset.
UTM zones are 6° wide. If you use Zone 17 coordinates but claim they're Zone 18, the conversion shifts your position by hundreds of kilometers. This happens when:
- Working near zone boundaries (e.g., New York spans Zones 17 and 18)
- Copying coordinates from another project in a different zone
- Equipment set to wrong zone—GPS default might not match your location
- Receiving coordinates from someone who didn't specify zone number
Formula: Zone = floor((Longitude + 180) / 6) + 1
Quick reference: Eastern US (Maine to Florida): Zones 17-19. Central US: Zones 14-16. Western US: Zones 10-13. If your zone number doesn't match this, investigate immediately.
Error #3: MGRS String Not Recognized or Converts Wrong
Your MGRS coordinate string returns an error, or converts to a location that's off by 1-100 kilometers. Sometimes the conversion tool accepts the string but the resulting DD coordinates don't match GPS readings.
- Count digits after the 100km letters: Must be even number (2, 4, 6, 8, or 10 total)
- Verify no I or O letters appear anywhere in the string
- Check that zone number (first 1-2 digits) matches your region
- Confirm latitude band letter (after zone number) matches hemisphere: C-M = South, N-X = North
- Test by converting to DD and plotting—should be within 1km of expected location even with low precision
Error #4: Converted Coordinates Lose Accuracy
You convert coordinates through multiple formats and back to the original—the numbers don't match exactly. Or surveyed positions shift slightly after conversion. Small differences accumulate into significant errors.
- Store original coordinates in their native format—don't convert unless necessary
- When conversion required, use double-precision floating point (64-bit) throughout
- Perform all calculations before rounding—round only the final result for display
- If converting through multiple formats, convert directly between start and end—avoid intermediate conversions
- Document precision at each step: "GPS collected at ±2m, rounded to 6 decimals for database storage"
Error #5: North/South or East/West Direction Wrong
DMS coordinates convert to opposite hemisphere. Working in Texas but coordinates show location in South America or Europe. The numbers look correct but direction letter is wrong.
Latitude (N/S):
- Equator = 0°. North Pole = 90°N. South Pole = 90°S.
- USA (except Hawaii) = North
- Australia, South America (except north parts), South Africa = South
Longitude (E/W):
- Prime Meridian (Greenwich, UK) = 0°
- Americas = West
- Europe, Africa, Asia, Australia = East
- Pacific Ocean: West of 180°E = East hemisphere, East of 180°W = West hemisphere
Memory trick: "NEWS" - North-East-West-South. When writing DMS, direction letters follow this order in typical usage. Latitude (N or S) comes before longitude (E or W).
Professional Best Practices for Coordinate Work
Professional surveyors, GIS analysts, and navigation specialists follow strict protocols to prevent coordinate errors. These aren't bureaucratic rules—they're lessons learned from expensive mistakes. Adopt these practices and you'll avoid 99% of coordinate problems before they occur.
Always Document Coordinate Metadata
Never record coordinates without documenting: (1) Format (DD/DMS/UTM/MGRS), (2) Datum (WGS84/NAD83/NAD27), (3) Collection method (GPS/survey/digitized), (4) Accuracy estimate (±5m), (5) Date collected. This metadata prevents 90% of confusion when data is shared or revisited years later.
Perform Sanity Checks on Every Conversion
After converting, ask: "Does this location make geographic sense?" Plot the converted coordinates on a map. If you're working in Denver and coordinates show Montana, something's wrong. Simple sanity checks catch catastrophic errors immediately, before they propagate through entire projects.
Use Redundant Verification for Critical Points
For property corners, engineering control points, or military targets, verify coordinates using multiple independent methods: different GPS units, manual calculations, third-party conversion tools. If all methods agree within acceptable tolerance, confidence is high. Discrepancies demand investigation before proceeding.
Standardize on One Primary Format Per Project
Choose DD, DMS, UTM, or MGRS as the project master format. Store all coordinates in this format. Convert to other formats only when required for specific equipment or deliverables. Converting back and forth accumulates rounding errors and creates opportunities for mistakes. One source of truth prevents chaos.
Maintain Audit Trail for All Conversions
Document every coordinate transformation: original value, conversion method, tool used, date, operator name, and result. If errors discovered months later, audit trail lets you trace backward to source. Professional liability often hinges on proving you followed proper procedures and can reconstruct your work.
Test Conversion Tools Before Production Use
Before trusting a new coordinate converter for critical work, test it with known-good reference points. NGS (National Geodetic Survey) provides monumented points with certified coordinates. Convert these through your tool and compare results. Tools with bugs or incorrect algorithms fail these tests immediately, saving you from field disasters.
Advanced Coordinate Topics for Professionals
Beyond basic conversions, professional geodetic work involves nuanced topics that separate novices from experts. Understanding these advanced concepts prevents subtle errors that compound over large areas or long time periods. If you work with coordinates professionally, these topics will eventually affect your projects.
State Plane Coordinate Systems (US Only)
Each US state has one or more State Plane Coordinate (SPC) zones optimized for that state's geography. Unlike UTM's global 6° zones, SPC zones conform to state boundaries. Texas has five zones. California has six. Rhode Island needs only one. SPC uses feet (not meters) in many states, though metric versions exist.
Created in the 1930s for highway construction and land records. SPC provides better accuracy within each zone than UTM because zones are narrower and projection parameters are optimized for the specific region. Legal descriptions, property surveys, and government infrastructure projects in the US typically require SPC.
Conversion challenge: Going from GPS (DD in WGS84) to State Plane requires both datum transformation (WGS84→NAD83) and coordinate conversion (geographic→projected). The datum shift alone can move points by 1-2 meters. Professional surveying software like TBC or Carlson handles this automatically, but free converters often skip the datum transformation step—introducing systematic error.
Grid Distance vs Ground Distance
UTM and State Plane coordinates give you grid distance—the distance measured on the flattened projection. But surveyors measure ground distance—actual distance on Earth's curved surface at your elevation. These differ, and ignoring this causes construction layout errors.
Construction disaster: A tunnel project in Switzerland ignored elevation factor. Surveyors used grid distances at 500m elevation. Over 10km tunnel length, error accumulated to 2.8 meters. When crews digging from opposite ends met in the middle, the alignment was off by 2.8m horizontally—requiring expensive correction blasting and re-lining.
Lesson: Always apply combined scale factor for projects requiring centimeter accuracy. Total stations and surveying software have this built in, but CAD operators working with raw coordinates must manually apply corrections.
Geoid Height: Why GPS Elevation is Wrong
GPS receivers report elevation above the WGS84 ellipsoid—a mathematical smooth surface. But "sea level" follows the geoid—an irregular surface matching Earth's gravity field. The difference between ellipsoid and geoid varies globally from -100m to +100m. This is why GPS elevation doesn't match topographic map elevation.
GPS receiver shows: 1655m (ellipsoid height)
Geoid undulation at this location: -16.5m
True elevation: 1655 - (-16.5) = 1671.5m above sea level
USGS map shows: 1671m (matches after geoid correction)
How to get geoid undulation: Use NOAA's GEOID18 model (US) or EGM2008 (worldwide). Input your latitude/longitude, receive geoid height. Professional surveying software includes geoid models. Free tools: NGS GEOID18 calculator, GeoidEval utility. Without this correction, GPS elevations are systematically wrong—sometimes by 30+ meters in mountainous areas.
Polar Regions: When UTM Doesn't Work
UTM is undefined above 84°N and below 80°S because Transverse Mercator projection distortion becomes extreme near poles. For Arctic and Antarctic work, different coordinate systems are required. This affects military operations, scientific research, and polar aviation.
Practical impact: Research stations in Antarctica (McMurdo, South Pole) use UPS coordinates. Trans-polar flights must handle the transition from UTM to UPS mid-flight. GPS units have both projections built in and switch automatically based on latitude.
Professional Tools and Resources
While our converter handles most common coordinate transformations, professional geodetic work sometimes requires specialized software and authoritative references. Here's what the experts use for mission-critical coordinate operations.
Desktop GIS Software
Authoritative Online Resources
Essential Technical References
Field Work Mobile Apps
Start Converting Coordinates Now
Whether you're surveying property boundaries, planning military operations, analyzing GIS data, or navigating the backcountry—accurate coordinate conversion is essential. Our tool provides instant transformations between DD, DMS, UTM, and MGRS with WGS84 datum precision. No registration, no limits, completely free.
Frequently Asked Questions
What's the difference between accuracy and precision in coordinates?
Accuracy is how close your measurement is to the true position. Precision is how many decimal places you record. You can have high precision (8 decimals) but low accuracy (wrong by 50m due to poor GPS signal). Professional work requires both: accurate measurements and appropriate precision for the task.
Why do my GPS coordinates not match my paper map?
Most likely a datum mismatch. GPS uses WGS84 datum. Older maps use NAD27 or local datums. The same physical location has different coordinates in different datums—sometimes off by 100+ meters. Always check which datum your map uses and transform coordinates accordingly before comparison.
Can I use UTM coordinates across the entire United States?
Technically yes, but not recommended for large-scale projects. The US spans Zones 10-19. You cannot directly compare coordinates from different zones—they use different central meridians and projection parameters. For nationwide work, use Decimal Degrees or State Plane (which handles state boundaries intelligently).
How precise does my coordinate need to be for property surveys?
Legal property surveys typically require ±0.1 foot (3cm) accuracy. In Decimal Degrees, that means 7-8 decimal places (0.0000001° ≈ 1.1cm). UTM should record to whole centimeters. State laws vary—some require higher precision in urban areas. Always consult local surveying regulations and hire licensed professionals for legal boundary work.
Is MGRS only for military use?
No. While developed for military applications, MGRS is used by search and rescue teams, emergency responders, wildland firefighters, and expedition leaders worldwide. Its concise format and verbal communication advantages benefit anyone coordinating over radio. Many civilian GPS units support MGRS display as an option.
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Discover geolocation, ISP, security details, and network information for any IP address. Detect VPNs, proxies, and check threat levels instantly with real-time DNS lookup
Domain Age Checker
Check domain registration age, WHOIS data, and trust score instantly. Verify domain history with WHOIS and RDAP lookups for any website.
Email Validator
Verify email addresses instantly with advanced validation checks. Detect disposable emails, validate syntax, check MX records, and perform SMTP verification.
Fake Email Generator
Generate realistic fake email addresses for testing and development. Create bulk emails with names, passwords, and metadata. Export to CSV, JSON, SQL, XML, HTML, and TXT formats.
URL Redirect Checker
Trace complete redirect chains, detect loops, analyze SEO impact, and get actionable insights to optimize your URL redirects for search engines and users.
IPv6 to IPv4 Converter
Extract IPv4 addresses from IPv6 formats. Supports 6to4, NAT64, Teredo, IPv4-mapped, and IPv4-compatible addresses with RFC-compliant auto-detection and detailed conversion explanations.
Hostname Resolver
Resolve hostnames to IP addresses and perform reverse DNS lookups. Query all DNS record types (A, AAAA, MX, TXT, NS, CNAME) with batch processing support for comprehensive network intelligence.
Canonical URL Checker
Verify canonical tags, detect duplicate content issues, and fix SEO problems instantly. Analyze self-referential canonicals, trace redirect chains, and get actionable recommendations for better search engine indexing.
Network Latency Calculator
Calculate real-world latency from ping, packet loss, and jitter. Get gaming impact analysis across 8 game types (FPS, MOBA, Battle Royale, MMO, Racing, Fighting, RTS, Casual) with network optimization tips for competitive gaming.
Developer Tools
Code formatters, validators, and development utilities
JSON/YAML Formatter
Format and validate JSON/YAML with syntax highlighting. Beautify with custom indentation, minify for production, and validate syntax with detailed error reporting.
JSON Formatter (Advanced)
Professional JSON formatter with Dracula theme syntax highlighting. Format, beautify, minify, validate, sort keys, analyze structure, and export with real-time statistics. Supports 2/4 space indentation and keyboard shortcuts.
Text Encoder/Decoder
Encode and decode text in various formats including Base64, URL encoding, HTML entities, and more
File Format Converter
Convert between different file formats including CSV to JSON, XML transformations, and data format conversions
Hash Generator
Generate MD5, SHA1, SHA256, and other cryptographic hash functions for text and files
Lorem Ipsum Generator
Generate professional placeholder text instantly for your designs, mockups, and development
Regex Tester
Test and debug your regular expressions instantly with our powerful regex tester
Regex Library
Access 40+ prebuilt regex patterns for email, URL, phone, dates, and more. Live testing, match extraction, capture groups. Free regex pattern library.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) instantly. View header, payload, and token
Markdown Previewer
Write markdown on the left, see live HTML preview on the right. Support for GitHub Flavored Markdown, tables, code blocks,
Random String Generator
Generate cryptographically secure random strings, API keys, passwords, and tokens with our comprehensive tool supporting customizable length, character sets, and multiple output formats.
String Case Converter
Convert between camelCase, snake_case, kebab-case, and 12+ naming conventions. Perfect for developers switching between languages and refactoring code.
XML Formatter & Validator
Format messy XML with proper indentation, validate syntax with detailed error reporting, and minify for production. Perfect for SOAP, RSS, SVG, and configuration files.
Duplicate Line Remover
Remove duplicate lines instantly while preserving order. Perfect for cleaning log files, email lists, URLs, and text data.
Line Sorter Tool
Sort text lines alphabetically, numerically, naturally, or randomly. Remove duplicates, handle 100k+ lines, and organize data instantly with 4 powerful sorting algorithms.
Whitespace Remover & Cleaner
Clean up messy text with 6 intelligent removal modes. Remove extra spaces, tabs, and line breaks from code, data files, and content.
Text Reverser
Reverse text in 4 powerful modes: characters, word order, line order, or each word individually. Perfect for encoding, palindrome testing, and creative text transformations.
Color Blindness Simulator
Simulate how colors appear to people with different types of color vision deficiency. Test all 8 CVD types with scientific accuracy, get Delta-E scores, and ensure WCAG accessibility.
UUID/GUID Generator
Generate unique identifiers instantly with support for v1, v4, and v5 formats. Create up to 10,000 UUIDs at once with validation, analysis, and multiple export options.
Credit Card Validator
Validate credit card numbers instantly with Luhn algorithm checking. Detect card brands and verify formats—all in your browser with complete privacy.
Checksum Calculator
Generate and verify checksums instantly. Calculate MD5, SHA-256, SHA-512, and CRC hashes for text and files. Compare hashes and verify file integrity—all in your browser.
HTTP Status Code Checker
Monitor website uptime, detect broken links, and analyze HTTP responses instantly. Check single URLs or bulk validate up to 500 URLs with detailed status codes, redirect chains, and performance metrics.
SQL Formatter & Beautifier
Transform messy SQL into readable, maintainable code instantly. Format queries for MySQL, PostgreSQL, SQL Server, Oracle, and more.
Cron Expression Builder
Create perfect cron schedules visually or parse existing expressions. Support for Unix, Quartz, AWS EventBridge, and Kubernetes formats.
Crontab Validator
Validate cron expressions instantly with plain English explanations. Get next 10 execution times, detect syntax errors, and ensure your scheduled jobs run correctly with detailed validation checks.
CSV to SQL Converter
Transform CSV files into production-ready SQL INSERT statements instantly. Auto-detect data types, generate CREATE TABLE schemas, and export to PostgreSQL, MySQL, SQLite, or SQL Server.
Plagiarism Checker (Lite)
Check your text for potential plagiarism against a curated corpus. Get instant similarity scores, highlight matched segments, and ensure content originality.
Robots.txt Generator
Generate SEO-optimized robots.txt files instantly. Create professional robots.txt to control Googlebot, Bingbot, and AI crawlers with RFC 9309 compliance.
Sitemap Generator
Generate valid XML sitemaps for SEO instantly. Create sitemap.xml files with changefreq, priority, and lastmod tags. Improve search engine indexing and help Google discover all your pages.
Meta Tag Generator
Generate SEO-optimized meta tags instantly. Create Open Graph, Twitter Cards, and Schema.org JSON-LD markup with live preview. Perfect for social sharing and search engine optimization.
Schema.org Generator
Generate valid JSON-LD structured data for Article, Product, Recipe, and FAQ schemas. Boost search rankings with Google-compliant Schema.org markup. Earn rich snippets and increase CTR by 30%+.
Docker Command Generator
Generate docker run commands and docker-compose.yml files visually. Configure ports, volumes, environment variables with 12 presets. Get copy-paste ready commands instantly.
Nginx Config Generator
Generate production-ready Nginx configurations for static sites, reverse proxy, load balancing, SSL/TLS, WordPress, Node.js, and more. Include security headers, caching, gzip, and best practices instantly.
SSH Config Generator
Generate properly formatted SSH configuration entries for GitHub, AWS EC2, bastion hosts, and development servers. Supports ProxyJump, IdentityFile, ForwardAgent, and all OpenSSH options with validation.
Git Branch Name Generator
Generate semantic Git branch names from ticket numbers and descriptions. Auto-sanitize special characters, validate against Git rules, and create feature, bugfix, hotfix, release branches following best practices.
Package.json Analyzer
Analyze npm dependencies, detect outdated packages, scan for CVE vulnerabilities, and generate upgrade commands. Ensure Node.js project security with SemVer analysis, license compliance checks, and automated dependency auditing.
Git Conflict Visualizer
Compare two code versions side-by-side with Myers diff algorithm. Get instant diff visualization, syntax highlighting for 20+ languages, merge suggestions, and unified patch format for seamless conflict resolution.
Environment Variable Generator
Convert between .env, JSON, YAML, Docker Compose, and Kubernetes ConfigMap/Secret formats instantly. Supports base64 encoding, auto-detection, and client-side processing for complete privacy.
Matrix Calculator
Perform matrix operations instantly: add, subtract, multiply, transpose, determinant, inverse, and power. Support for 2×2 to 5×5 matrices with step-by-step calculations and formatted results.
Prime Number Checker
Test primality instantly using Miller-Rabin algorithm. Get prime factorization, divisors, special prime detection (Twin, Sophie Germain, Mersenne), and batch checking for numbers up to 10¹⁵.
Palindrome Checker
Check if any text is a palindrome instantly. Verify words, phrases, and sentences that read the same forwards and backwards with advanced normalization and statistics.
Anagram Finder
Find all anagrams for any word instantly. Discover word patterns, explore letter combinations with 10k+ dictionary, advanced filters, and instant statistics. Perfect for word games and puzzles.
Chmod Calculator
Convert Unix/Linux file permissions between numeric (755), symbolic (rwxr-xr-x), and visual grid formats. Get chmod commands, security analysis, and permission explanations instantly.
Unix Permissions Decoder
Decode Unix/Linux symbolic permissions (rwxr-xr-x) to numeric octal format (755) instantly. Get security analysis, file type detection, and permission breakdowns with real-time validation.
PBKDF2 Hash Generator
Generate secure PBKDF2 password hashes with OWASP-compliant iterations. Create cryptographically strong hashes for authentication systems with SHA-256/SHA-512 support, custom salts, and instant verification code examples.
Argon2 Hash Generator
Generate military-grade Argon2 password hashes with OWASP & NIST recommended security. Winner of Password Hashing Competition. Create Argon2id/Argon2i hashes with customizable parameters, PHC format encoding, and instant verification.
JWT Signature Cracker
Test JWT security with dictionary attacks. Crack weak HMAC secrets (HS256/384/512) using 10k+ common passwords or custom wordlists. Concurrent cracking, performance metrics, security recommendations. Educational and authorized testing only.
Diffie-Hellman Key Generator
Generate cryptographic key pairs using NIST RFC 3526 safe primes (2048-8192 bit). Create secure Diffie-Hellman keys for encrypted communication with full key exchange simulation, multiple output formats, and SHA-256 fingerprints.
PEM File Decoder
Decode and analyze X.509 certificates, private keys, public keys, and CSRs instantly. Extract certificate details, validate chains, check key strength, and view fingerprints with comprehensive security analysis.
OpenSSL Command Generator
Generate production-ready OpenSSL commands for certificates, keys, encryption, and digital signatures. Create CSRs, self-signed certificates, RSA/ECDSA/Ed25519 keys, and manage PKCS#12 files with security best practices.
Ping & Packet Loss Tester
Diagnose network connectivity, measure latency, detect packet loss, and assess connection quality with our comprehensive ICMP ping testing tool.
AI Token Counter
Count tokens for GPT-4, Claude 3/4.5, Llama, and 13+ AI models. Get accurate token counts with tiktoken, estimate API costs, view token breakdown, and compare models instantly.
Math Reasoning Test
Practice algebra, geometry, calculus, and logic with adaptive difficulty tests. Get instant grading, step-by-step explanations, and personalized study recommendations.
PDF to Text Converter
Extract text, tables, and metadata from PDF documents. Supports vector PDFs, OCR for scanned documents, password-protected files. Export to TXT, Markdown, JSON, CSV, HTML, XML.
Text Summarizer
Condense long articles and documents into concise summaries instantly. Extractive summarization with word frequency analysis, keyword extraction, and reading time estimates.
Embedding Similarity Calculator
Compare text similarity using TF-IDF and cosine similarity. Get instant similarity scores, compare documents, and analyze semantic relationships—100% local processing.
AI Text Cleaner
Clean and optimize text for ChatGPT, Claude, and Gemini. Remove HTML, normalize formatting, and save 25-35% on API tokens with smart AI model presets.
Logic Puzzle Solver
Solve Sudoku, Zebra puzzles, and custom grid logic puzzles instantly. Advanced constraint satisfaction algorithms with step-by-step solutions, difficulty ratings, and performance statistics.
Buffer Generator
Generate custom buffers for penetration testing, fuzzing, and exploit development. Create cyclic patterns, find offsets, avoid bad characters with multiple encoding formats.
PDF Metadata Remover
Remove sensitive EXIF, GPS, author, and creation metadata from PDF files. Protect your privacy with secure metadata cleaning—strip hidden data instantly.
PDF Encrypt & Decrypt
Encrypt PDFs with AES-256 password protection or decrypt password-protected PDFs. Set custom permissions for printing, copying, and editing. 100% secure and private.
PDF Password Remover
Remove passwords from encrypted PDFs instantly. Unlock password-protected PDF files with AES-256/128 decryption support. 100% client-side processing for maximum privacy.
Design & Media Tools
Color converters, image processors, and design utilities
Color Converter
Convert colors between HEX, RGB, HSL, and other formats. Generate color palettes and accessibility checks
Image to Base64
Convert images to Base64 encoding for embedding in HTML, CSS, or applications. Supports multiple formats
TIFF to PNG/JPG Converter
Convert TIFF images to PNG or JPG format instantly with quality control. Free online converter with 100% privacy and browser-based conversion.
HEIC to JPG Converter
Convert iPhone photos from HEIC/HEIF to JPG or PNG instantly. 100% private browser-based conversion with quality control, batch processing, and EXIF preservation.
SVG to PNG Converter
Convert SVG files to high-quality PNG images with custom dimensions, transparency support, and quality control. Perfect for web, print, and design projects.
ZIP File Extractor
Extract and view ZIP archive contents online. Upload your .zip file, preview contents, and download individual files instantly with full security checks.
File Encryption
Secure your files with military-grade AES-256 encryption. Protect sensitive documents
Image Metadata Cleaner
Remove EXIF data, GPS location, camera info, and personal metadata from your photos.
ASCII Art Generator
Transform text into stunning ASCII art with 6 unique fonts. Create banners, logos, and decorative text for terminals, social media, and code comments.
Free Slug Generator
Convert titles and text into clean, SEO-friendly URL slugs instantly. Perfect for blogs, e-commerce, and web development.
.htaccess File Generator
Create secure, optimized Apache .htaccess files in seconds. Configure redirects, security rules, caching, and performance settings with our intuitive visual builder. No coding expertise required.
Aspect Ratio Calculator
Calculate image and video dimensions maintaining perfect aspect ratios. 14+ presets including 16:9, 4:3, 1:1, Instagram, YouTube, TikTok. Find ratios, scale dimensions, and simplify with GCD algorithm.
Font Size Calculator
Convert between px, em, rem, pt, %, vw, and vh with live preview. Perfect for responsive web design and WCAG accessibility compliance. Instant conversion with real-time typography preview.
SVG to Data URI Converter
Convert SVG to data URI with URL or Base64 encoding. Optimize SVGs, get CSS/HTML/React code. Perfect for inline CSS backgrounds and reducing HTTP requests.
Productivity Tools
Text processing, calculators, and workflow utilities
User Agent Parser
Parse and analyze user agent strings to identify browsers, devices, and operating systems
Free Word Counter
Keep your work on track with our word counter. Instantly view word, character, and sentence counts to meet your writing requirements
Invoice Generator
Create professional invoices instantly with automatic tax calculations, discounts, and beautiful formatting
Text Diff Tool
Compare text files and find differences instantly. Side-by-side comparison with highlighted changes for code review
Unit Converter
Convert between units instantly and privately. Transform length, weight, temperature, volume, area, and time measurements with precision
HTML Entity Encoder
Convert special characters to HTML entities and back. Protect your code from XSS attacks and ensure proper HTML rendering.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa instantly.
Scientific Calculator
Advanced online calculator with trigonometric functions, logarithms, exponentials, and more. Calculate complex mathematical expressions with full calculation history and keyboard support.
Screen Utility Tool
Professional screen testing with 15+ modes: white/black screens, dead pixel detector, monitor calibration, hacker typer, Matrix rain, starfield, and more. Test displays, detect defects, and verify warranty claims instantly.
Monitor PPI Calculator
Calculate pixels per inch for any monitor and check Retina quality at viewing distance. Compare to 14 popular devices with 16+ monitor presets for 4K, 1440p, 1080p, and ultrawide displays.
Monitor Distance Calculator
Calculate optimal viewing distance for your monitor based on THX, SMPTE, and ergonomic standards. Get personalized recommendations for competitive gaming, productivity, and movies with FOV analysis.
Marketing Tools
QR code scanner, GIF maker, Audio Normalizer, and more
Gaming tools and Finance, Crypto
Cloud Cost Calculator, Pc bottleneck, GPU Mining Calculator, and more
FPS Calculator
Calculate expected gaming FPS for your CPU and GPU combination across 20+ games. Estimate performance at 1080p, 1440p, 4K with ray tracing, DLSS, and FSR support. Detect bottlenecks and optimize your gaming PC build.
PC Bottleneck Calculator
Find out if your CPU bottlenecks your GPU or vice versa. Get instant FPS estimates, hardware compatibility analysis, and personalized upgrade recommendations for 1080p, 1440p, and 4K gaming.
PSU Wattage Calculator
Calculate your PC's exact power consumption and get instant PSU recommendations with safety headroom. Build with confidence using accurate TDP data for CPUs, GPUs, and all components.
VRAM Calculator for AI
Calculate GPU memory requirements for running and training Large Language Models. Get instant VRAM estimates for inference, training, and LoRA fine-tuning.
Crypto Profit Calculator
Calculate your cryptocurrency trading profits, estimate taxes, and optimize your strategy with FIFO, LIFO, HIFO, and Average Cost methods.
Bitcoin Address Generator
Generate secure Bitcoin addresses instantly. Create Legacy (P2PKH), SegWit (P2SH), or Native SegWit (Bech32) addresses with QR codes
Hash Rate Calculator
Convert mining hash rates instantly between all units. Compare hardware performance with popular ASIC and GPU presets. Support for H/s, KH/s, MH/s, GH/s, TH/s, PH/s, and EH/s conversions.
RAM Speed Calculator
Calculate RAM performance metrics instantly. Analyze true latency, bandwidth, gaming scores, and FPS impact for DDR4/DDR5 configurations. Get optimization recommendations for your memory setup.
Overclocking Calculator
Calculate safe CPU and GPU overclocking settings with cooling analysis. Get conservative, balanced, and aggressive profiles with frequency, voltage, and temperature recommendations for 20+ components.
Gaming Resolution Calculator
Find the perfect gaming resolution for your GPU. Get instant FPS estimates at 1080p, 1440p, and 4K for 40+ GPUs across AAA, esports, and indie games with DLSS/FSR recommendations.
CPU Cooler Calculator
Find the perfect CPU cooler for your processor. Calculate required cooling capacity based on TDP, overclocking plans, and case airflow. Get personalized air cooler and AIO recommendations with budget-specific product examples.
Monitor Response Time Calculator
Calculate actual monitor response time vs marketed specs. Analyze TN, IPS, VA, and OLED panels with GtG measurements, motion clarity scores, and overdrive recommendations for 60Hz-360Hz gaming monitors.
Case Airflow Calculator
Optimize PC case cooling with CFM calculations, positive/negative pressure analysis, and fan placement recommendations. Supports Mini-ITX to Super-Tower builds with AIO placement optimization for maximum cooling efficiency.
FOV Calculator for Gaming
Calculate optimal field of view based on monitor size, aspect ratio, and viewing distance. Get horizontal, vertical, diagonal FOV for 15+ FPS games with competitive and immersive mode recommendations.
Mouse DPI Calculator
Convert mouse sensitivity between 15+ FPS games instantly. Calculate eDPI, 360° mousepad distance, and maintain muscle memory across CS2, Valorant, Apex, Overwatch, and more with accurate yaw-based conversions.
Streaming Bitrate Calculator
Calculate optimal streaming bitrate for Twitch, YouTube, Facebook Gaming, TikTok Live, and Kick. Get encoder settings (NVENC, x264, AMD VCE), quality scores, OBS/Streamlabs configuration, and platform-specific recommendations for 720p to 4K60 streaming.
RAID Storage Calculator
Calculate RAID array capacity, usable storage, and performance instantly for RAID 0, 1, 5, 6, 10, 50, and 60 configurations. Plan NAS, servers, and workstation storage with fault tolerance analysis and efficiency ratings.
Geoscience, Geospatial tools, Distance, Polygons and more
Coordinate Converter, Area Calculator (Polygon), Bearing Calculator, and more
Coordinate Converter
Convert GPS coordinates instantly between Decimal Degrees, DMS, UTM, and MGRS formats. Perfect for surveyors, GIS professionals, hikers, and military operations.
Distance Calculator
Calculate distances between any two points on Earth. Get accurate great circle distances in kilometers, miles, and nautical miles.
Polygon Area Calculator
Calculate land area from GPS coordinates instantly. Convert between square meters, acres, hectares, and more. Support for manual input, bulk coordinates, and preset polygons.
Bearing Calculator
Calculate bearing and distance between two GPS coordinates instantly. Perfect for pilots, sailors, hikers, surveyors, and navigation planning.
Midpoint Calculator
Calculate the geographic center point between multiple GPS coordinates instantly. Perfect for finding meeting locations, planning routes, and analyzing spatial data.
Shapefile to GeoJSON Converter
Convert ESRI Shapefiles to GeoJSON instantly. Upload SHP, SHX, DBF files with automatic projection detection. Perfect for web mapping, APIs, and modern GIS workflows.
GeoJSON to CSV Converter
Transform GeoJSON map data into Excel-ready CSV files instantly. Convert coordinates, flatten properties, and export geographic features with full geometry support.