Free map tools that measure correctly
Draw a radius, measure a distance or an area, and share the result with a link. GeoDrafter calculates on the real shape of the Earth (the WGS84 ellipsoid), not on a flat map, and says how exact each answer is.
Map tools
- Radius mapDraw circles with an exact radius in km, miles or metres
- DistanceMeasure straight-line distance between points, leg by leg
- AreaMeasure the area of a field, plot or region in ha, acres or km²
- ElevationFind the height above sea level of any point, in metres or feet
- CoordinatesConvert lat/long, DMS, UTM and EPSG codes, one point or a list
- Lat/longClick the map to get latitude and longitude in every common format
- ProfileDraw a line and see its elevation profile, ascent and descent
- ZIP radiusList the US ZIP codes within a number of miles of a ZIP or a place
- MidpointFind the halfway point between two or more places
- DrawDraw points, lines and areas and export them as KML, GeoJSON or GPX
- BearingInitial, final and back bearing between two points, with the rhumb line
- MaidenheadGrid square locator for radio amateurs, with a grid map and distances
- BordersClick a country for its area, borders, coastline and neighbours
- Cities in radiusList the towns and cities within a number of kilometres or miles of a place
- Antipode mapFind the point exactly opposite any place on Earth, land or sea
- County lookupFind the US county for your location, a ZIP code or any point
- MGRS converterMGRS and USNG grid references to lat/long and back, with the grid on the map
- Time zone lookupThe time zone, local time and next clock change at any point
- Grid reference finderOS grid references to latitude/longitude and back, with the National Grid on the map
- Sun position calculatorSun elevation, azimuth, sunrise, sunset and the sun's path on the map
- Moonrise & moonset calculatorMoonrise, moonset, moon phase and the moon's direction on the map
- UTM zone mapAll 60 UTM zones on a map, and the zone, band and EPSG code of any point
- Plot coordinatesPaste a list or a CSV and see all the points on a map, coloured by a column
- Line of sightCheck if two points can see each other, with curvature and Fresnel zone
Guides
Why use GeoDrafter
- Correct: circles, distances and areas are calculated geodesically with GeographicLib, so a 100 km radius is 100 km on the ground everywhere, also far north and far south.
- Honest about accuracy: every tool explains what limits the result, from map clicks to elevation data resolution.
- Share and export: what you draw is kept in the page link, and can be downloaded as KML or GeoJSON for Google Earth and GIS software.
- Free and simple: no account, no installation, works on phones.
Built by a GIS specialist. Need to convert the exported files to another format? FileReshape, our sister site, converts KML, GeoJSON, shapefiles and GPX in your browser.