Click points on the map to measure distances or draw polygons to calculate area. All computation happens in your browser.
Click the map to place waypoints. Double-click or click ✓ Finish to complete.
This distance calculator uses the Haversine formula to calculate great-circle distances between points on a sphere, accounting for the Earth's curvature. Results are accurate for most practical purposes.
The area calculator uses the spherical excess method to compute the area of a polygon on the Earth's surface. All calculations are performed entirely in your browser — no data is sent to any server.