🧭 Distance Calculator
Enter the latitude and longitude of two places to get the great-circle distance between them in kilometres, miles, and nautical miles — ideal for planning routes and comparing flights.
📍 Two Points, One Distance
What is a Distance Calculator?
It measures how far apart two places are in a straight line across the globe. Give it the coordinates of a start and an end point and it applies the Haversine formula to return the great-circle distance — the same arc a long-haul flight roughly traces — in three units at once so you can think in whichever you prefer.
Use it to gauge how far you're really travelling, sanity-check a flight's length, or compare two destinations from home. Remember it's the as-the-crow-flies figure: real road, rail, and flight routes run longer, and these are estimates for planning — verify routes and schedules with official sources.
❓ Frequently Asked Questions
How is the distance calculated?
It uses the Haversine formula to compute the great-circle distance — the shortest path over the surface of a sphere — between two latitude/longitude points, using Earth's mean radius of 6,371 km. The result is returned in kilometres, then converted to miles (× 0.621371) and nautical miles (× 0.539957).
What is great-circle distance, and why isn't it the driving distance?
Great-circle distance is the straight 'as the crow flies' line over the curved surface of the Earth — the route a long-haul flight roughly follows. Road and rail journeys wind around terrain, coastlines, and infrastructure, so they're always longer; expect real driving distance to be noticeably more than the figure here.
Where do I find the coordinates for a place?
Right-click a spot in most online maps to copy its latitude and longitude, or search the place name plus 'coordinates'. Enter them in decimal degrees — for example London is about 51.5074, −0.1278. Use a negative longitude for west and a negative latitude for the southern hemisphere.
How accurate is this for planning a flight?
It's a solid first approximation of the airborne distance, which you can pair with our flight time calculator. Actual routes deviate for air-traffic control, winds, and restricted airspace, so treat it as an estimate for planning and verify routes and schedules with official sources.