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Coordinate Distance Calculator
Find the great circle distance between two coordinate pairs in kilometres, miles and nautical miles.
Great circle distance
Distance: —
Also: —
Midpoint: —
How to use the Coordinate Distance Calculator
- Enter the latitude and longitude of the starting place.
- Enter the latitude and longitude of the destination.
- Pick a main unit and read the distance, the other units and the midpoint.
Features
- Great circle distance from two coordinate pairs
- Kilometres, miles and nautical miles at once
- Midpoint of the route in latitude and longitude
- Negative values accepted for south and west
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Frequently Asked Questions
Common questions about the free online coordinate distance calculator.
The tool uses the haversine formula on a sphere with a mean radius of 6371 kilometres to find
the great circle distance.
The great circle distance between London and Paris is about 344 kilometres, or roughly 214
miles as the crow flies.
It is the shortest path between two points on the surface of a sphere, which is how long haul
flight routes are planned.
The result measures a straight line over the globe, so road journeys are always longer
because they follow real routes.
One nautical mile is 1852 metres, which is about one minute of latitude, and it is the
standard unit in aviation and shipping.
Yes. Use negative values for southern latitudes and western longitudes, such as minus 0.1278
for central London.
The spherical model is accurate to about half a percent, which is close enough for travel
planning and study.
Yes. All the maths runs locally in your browser with no network connection, no uploads and no
accounts.
Yes. The coordinate distance calculator is completely free and unlimited, with no sign-up
needed.
Last updated: October 10, 2026