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

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.