Haversine Distance (Lat/Lon)
Calculate the great-circle distance between two points on Earth given their latitude and longitude using an equirectangular approximation.
Results
What is it?
The Haversine Distance Calculator computes the straight-line (great-circle) distance between two geographic points using their latitude and longitude. This equirectangular approximation is accurate to within ~0.5% for distances under 1,000 km and is ideal for quick GIS calculations, geocaching, and geographic analysis.
How to use
Enter the latitude and longitude for your two locations in decimal degrees (negative for South/West). London is at 51.5074 N, -0.1278 W; Paris is at 48.8566 N, 2.3522 E. The calculator instantly returns distance in kilometres and miles.
Example scenario
London (51.5074, -0.1278) to Paris (48.8566, 2.3522): the equirectangular result gives approximately 341 km (212 miles). The true haversine result is ~341 km, so the approximation is excellent for mid-latitude calculations.
Pro tip
The equirectangular formula is highly accurate within the same continent. For antipodal points (e.g. across hemispheres), error increases. Remember: 1 degree of latitude is approximately 111 km; 1 degree of longitude varies with cos(latitude).