Map Distance & Area Measurer
Measure distance and area on a map — just click to drop points.
How to use Map Distance & Area Measurer
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Pick what you’re measuring
Choose Distance to measure the length of a path, or Area to measure the size of a region and its perimeter.
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Click the map to drop points
Each click adds a point. Add at least two points for a distance, or three to enclose an area. Pan and zoom to line things up exactly.
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Read your result
The readout updates live as you add points, showing distance — or area and perimeter — in both metric and imperial units.
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Tidy up as you go
Misclicked? Undo the last point, or clear everything and start fresh. You can also jump to your current location to begin nearby.
Key features
- Click to measure distance along a path, or the area and perimeter of any shape
- Every result shown in both metric (m, km, m², km², hectares) and imperial (ft, mi, acres)
- Accurate great-circle math that accounts for the curve of the Earth
- Undo your last point or clear the whole measurement in one tap
- Optional “use my location” to centre the map on where you are
- The measuring runs entirely in your browser — your route is never uploaded
About Map Distance & Area Measurer
Ever needed to know how far it is along a winding trail, or how many acres a field really covers? Just click your way around the map and this tool does the rest. Drop a couple of points to measure a distance, or trace a shape to measure its area and perimeter — you’ll get the answer in both metric and imperial as you go. The map itself is drawn with OpenStreetMap tiles, so you’ll need an internet connection and the spots you look at are sent to the tile server as ordinary map views. The measuring, though — every distance and area calculation — happens entirely in your browser. No sign-up, no uploads of your route, no limits.
Last updated 2 June 2026.
Frequently asked questions
- Is this completely private?
- The distance and area calculations run entirely in your browser, so your points and route are never uploaded. The map images themselves come from OpenStreetMap, which means the areas you pan and zoom to are sent to its tile servers as normal map requests — the same as any web map.
- How accurate are the measurements?
- Distances use the haversine great-circle formula and areas use a spherical-excess formula, so both account for the curvature of the Earth and are accurate to within a fraction of a percent for everyday use. Your real-world precision is limited mostly by how exactly you place each click on the map.
- What units can I see?
- Both at once. Distances appear in metres or kilometres alongside feet or miles. Areas appear in square metres or square kilometres alongside hectares and acres — handy for land, fields, and roofs.
- How do I measure an area instead of a distance?
- Switch the mode toggle to Area, then click around the outline of the region. The tool automatically closes the shape back to your first point and reports both the enclosed area and the perimeter.
- Do I need an internet connection?
- Yes, to load the map tiles from OpenStreetMap. Once a tool page is open the calculations work offline, but you won’t be able to pan to fresh, un-cached parts of the map without a connection.
- Why is the map blank or slow sometimes?
- The free OpenStreetMap tile servers occasionally rate-limit heavy use. For a personal measurement that’s rarely an issue; for production traffic you’d point the tool at a dedicated tile provider with an API key.