Coordinates · 64 free tools
Coordinate Finders, Converters and Format Tools
Coordinates are only useful when the notation survives the trip between systems. Use the latitude and longitude finder to get a point from a map or a search, the coordinate converter to move between decimal degrees, DMS, UTM, MGRS, Plus Codes and geohash, and the coordinate parser when a pasted pair does not announce which format it is in.
Almost every coordinate bug is one of three mistakes: swapped latitude and longitude (GeoJSON is longitude first), a datum mismatch such as NAD27 against WGS84, or false precision — seven decimals imply a survey the original device never performed. The tools here make each of those visible instead of silently fixing them: the parser names the format it recognised, the converter keeps the units labelled, and the precision tool explains what each decimal place represents in metres. Numeric precision is not measurement accuracy, and this cluster keeps the two apart.
For turning coordinates into human answers, jump to location and geocoding; for measuring real ground distances between points, use the distance calculators or the bearing and midpoint tools. Map-tile and projection helpers sit further down this page.
Start with these
The three tools that answer the most common question in this cluster. Each page states its method, coverage and limits.
All coordinates tools
Every tool in this cluster is linked from this page, so nothing here depends on a search box or a JavaScript menu to be reachable.
Latitude and Longitude Finder
PopularCoordinates of any place — decimal, DMS, UTM, MGRS, Plus Code.
WorldwideCoordinate Converter
Convert between decimal degrees, DMS and related formats.
WorldwideCoordinate Parser
Parse a decimal latitude/longitude pair into separate numeric fields.
WorldwideArcminutes to Decimal Degrees Converter
Convert arcminutes into decimal degrees and arcseconds.
WorldwideArcseconds to Ground Distance Calculator
Estimate ground distance represented by angular arcseconds at a latitude.
WorldwideBounding Box Calculator
Create approximate north, south, east and west bounds around a point and radius.
WorldwideBritish National Grid Helper
Learn about British National Grid; BNG conversion is not available here.
WorldwideCoordinate Bounding Box Generator
Generate north, south, east and west bounds from a coordinate list.
WorldwideCoordinate Format Detector
Detect whether pasted coordinates match decimal latitude/longitude format.
WorldwideCoordinate Mean Calculator
Calculate the arithmetic mean latitude and longitude of a coordinate list.
WorldwideCoordinate Offset Calculator
Estimate latitude and longitude degree changes from north/east offsets.
WorldwideCoordinate Precision Tool
Round or inspect coordinate precision for sharing and storage.
WorldwideCoordinate Radius Points Generator
Generate evenly spaced latitude/longitude points around a radius circle.
WorldwideCoordinate Rounding Tool
Round latitude and longitude to a chosen decimal precision.
WorldwideCoordinate Span Calculator
Measure latitude and longitude span across a pasted list of coordinates.
WorldwideDecimal Degree Precision Calculator
Estimate ground-position precision for a selected number of decimal places.
WorldwideDecimal Degrees to Arcminutes Converter
Convert decimal angular degrees into arcminutes and arcseconds.
WorldwideDecimal to DMS
Convert decimal degrees to degrees-minutes-seconds.
WorldwideDegrees Latitude to Kilometers Calculator
Convert degrees of latitude into kilometres and miles.
WorldwideDegrees Longitude to Kilometers Calculator
Convert longitude degrees into distance at a chosen latitude.
WorldwideDegrees to Radians Converter
Convert angular degrees to radians and turns.
WorldwideDestination Point From Bearing Calculator
Find a destination coordinate from a start point, bearing and distance.
WorldwideDMS to Decimal
Convert degrees-minutes-seconds to decimal degrees.
WorldwideGARS Converter
Learn about GARS alongside common coordinate formats; GARS conversion is not available here.
WorldwideGeohash Encoder
Encode coordinates to geohash strings and decode them back.
WorldwideGrid Reference to Postcode Finder
Find the UK postcode nearest to a National Grid reference.
WorldwideGround Distance to Map Pixels
Convert ground distance into pixel distance using a known map resolution.
WorldwideH3 Hex Index Helper
Explore hexagonal indexing ideas alongside lat/lng for spatial keys.
WorldwideIrish Grid Helper
Coordinate helper for Ireland-focused mapping alongside GPS positions.
WorldwideLatitude Degree Distance Calculator
Convert a latitude-degree difference into north-south distance.
WorldwideLatitude Longitude Map
Paste coordinates and plot them as numbered pins on an interactive map.
WorldwideLatitude Longitude to Map Tile Calculator
Convert latitude/longitude into XYZ slippy-map tile coordinates for a zoom level.
WorldwideLatitude Longitude to Web Mercator
Convert WGS84 latitude/longitude into EPSG:3857 Web Mercator metres.
WorldwideLatitude Longitude to World Pixel Calculator
Convert latitude/longitude into global Web Mercator pixel coordinates at a zoom level.
WorldwideLatitude Longitude Validator
Validate decimal latitude and longitude against WGS84 ranges.
WorldwideLongitude Degree Distance Calculator
Convert a longitude-degree difference into east-west distance at a chosen latitude.
WorldwideMaidenhead Grid Locator
Encode or decode Maidenhead locator squares used in amateur radio.
WorldwideMap Meters Per Pixel Calculator
Calculate Web Mercator ground resolution from latitude, zoom and tile size.
WorldwideMap Pixels to Ground Distance
Convert pixel distance into ground distance using a known metres-per-pixel resolution.
WorldwideMap Tile Bounds Calculator
Calculate north, south, east and west geographic bounds for an XYZ tile.
WorldwideMap Tile Center Calculator
Find the latitude/longitude centre of an XYZ Web Mercator tile.
WorldwideMap Tile Count by Zoom
Calculate tiles per axis and total world tiles at a Web Mercator zoom level.
WorldwideMap Tile Ground Width Calculator
Calculate the approximate ground width covered by one Web Mercator tile.
WorldwideMap Tile Pixel Offset Calculator
Find the pixel offset inside the containing 256-pixel XYZ tile for a coordinate.
WorldwideMap Tile to Latitude Longitude Calculator
Convert XYZ slippy-map tile coordinates into the northwest latitude/longitude corner.
WorldwideMap Unit Converter
Convert map-friendly units: km, miles, acres, hectares, metres and more.
WorldwideMap Zoom From Resolution Calculator
Estimate Web Mercator zoom level from latitude and target metres per pixel.
WorldwideMGRS Converter
Convert coordinates to Military Grid Reference System and back.
WorldwideNational Grid Reference Converter
Convert between latitude/longitude and OS National Grid references.
WorldwideNational Grid Reference Map
See any OS grid reference plotted on a live map.
WorldwidePlus Code Finder
Encode or decode Open Location Codes (Plus Codes).
WorldwidePolygon Centroid From Coordinates
Estimate the geometric centroid of a coordinate polygon.
WorldwidePolygon Perimeter From Coordinates
Estimate polygon perimeter from pasted coordinate vertices.
WorldwidePostcode to National Grid Converter
Convert a UK postcode to its OS grid reference and easting/northing.
WorldwideQR Location Helper
Create clear coordinate text to encode in a QR code for meetups.
WorldwideQuadkey / Tile XYZ Helper
Relate map points to web map tile ideas (XYZ / quadkey style).
WorldwideQuadkey to XYZ Tile Converter
Decode a Bing-style quadkey into XYZ tile X/Y/zoom values.
WorldwideRadians to Degrees Converter
Convert radians to angular degrees and turns.
WorldwideUS State Plane Helper
Support US State Plane style workflows from WGS84 GPS coordinates.
US focusedUTM Converter
Convert latitude/longitude to UTM and back.
WorldwideWeb Mercator Scale Factor Calculator
Calculate Web Mercator linear scale factor and distortion at a latitude.
WorldwideWeb Mercator to Latitude Longitude
Convert EPSG:3857 X/Y metre coordinates back to WGS84 latitude/longitude.
WorldwideWhat3Words-Style Location Helper
Work with short location codes and coordinates in one place.
WorldwideXYZ Tile to Quadkey Converter
Convert XYZ tile X/Y/zoom values into a Bing-style quadkey.
WorldwideLearn more about coordinates
Guides explain the method behind these numbers, the cases where it misleads, and how to choose between two tools that look interchangeable.
- Understanding GPS Coordinates: Formats, Datums and PrecisionA practical guide to latitude/longitude: what decimal degrees and DMS really mean, why datums matter, and how many decimal places you actually need.Read the guide →
- How to Find the Latitude and Longitude of Any PlaceSearch an address, click a map, or use GPS — then read decimal degrees the way software expects, without swapping lat and lng.Read the guide →
- What Are Plus Codes? Open Location Codes Without a Street AddressPlus Codes turn coordinates into short codes you can share by text. Where they help, where they don’t, and how to encode or decode them.Read the guide →
- Map Projections Explained: Why Every Flat World Map Distorts SomethingUnderstand why flat maps change area, shape, distance or direction, why Mercator looks the way it does, and how to choose a projection for the job.Read the guide →
You may also need
These clusters answer the questions that usually follow a coordinate tools result.
Best-of lists in this cluster
- Best Free Online Map Tools
If you only bookmark one thing, bookmark the directory; if you bookmark three, take a radius map, a distance calculator and a coordinate converter.
- Best Free GPS and Location Tools
Finding yourself is the easy half; naming what you found, and checking a recorded track, is where the useful tools are.
- Best Free GIS Tools for Beginners
Before reaching for a desktop GIS, open the file in a browser viewer — most 'broken' files are a coordinate-order or delimiter problem.
- Best Free Coordinate Conversion Tools
Conversion is easy; the mistakes happen before and after it. Confirm the datum and the axis order, then convert.
- Best Free GPX, GeoJSON and KML Tools Online
The distinctive cluster on this site: file tools that parse in the browser and tell you what they dropped.
About this hub
64 tools are grouped here because they answer the same family of questions. Every result is produced in your browser from the method stated on its own page; for legal, surveying, safety-critical or regulated decisions, verify the answer with the responsible authority.