Distance & Area Calculator
Geodesic distance, bearing, perimeter and area from latitude/longitude or grid coordinates — for two points or a whole boundary. Areas in hectare, acre, guntha or your own local unit. Nothing is uploaded: every value is computed in your browser.
Point A
Point B
The same area in other units
Bigha, biswa, katha and similar units differ from district to district, so this tool never assumes a value — enter the conversion used locally and it is applied to the computed area.
Method. Distances and azimuths are geodesic — Vincenty (1975) on the selected ellipsoid, the shortest path over the curved earth rather than a flat approximation. Area is the true area enclosed by geodesic sides, integrated over the ellipsoid through the authalic latitude. Both are checked against GeographicLib on every release: over a test set spanning 14 m to 6,700 km and three ellipsoids the distances agree to within 0.00002 m, azimuths to 2×10⁻⁹°, and areas to better than 1 part in 10 million. Grid area is the plane (shoelace) area of the same points projected to UTM — it is smaller or larger than the true ground area by roughly the square of the point scale factor, which is why both numbers are shown. Nothing is uploaded; the page keeps working with the network disconnected, apart from the map tiles.
Need the boundary surveyed and certified?
BTPL establishes control, records boundaries with GNSS/RTK and total station, and delivers signed area statements, CAD drawings and shape files.