Geographic Midpoint Calculator
Find the true half-way point between two coordinates — the midpoint of the great-circle route — computed on a sphere so it stays correct even across long distances.
Great-circle midpoint
Meeting in the middle, done properly
The geographic midpoint is where the shortest path between two points reaches its half-way mark. It sounds like it should just be the average of the two coordinates, and for two nearby points it nearly is — but on a sphere that shortcut bends away from the truth as the distance grows, and it breaks entirely near the poles or the antimeridian.
This calculator sidesteps that by working in three dimensions: it places both coordinates on a unit sphere, combines them, and reads the midpoint back off as a clean latitude and longitude. The result is a coordinate you can drop straight into the distance and bearing tools, or into any map app.
Frequently Asked Questions
What is a geographic midpoint?
It is the point that sits exactly half-way along the great-circle route between two coordinates — the shortest path over the surface of the Earth. It is the natural "meet in the middle" point between two places.
Why not just average the two coordinates?
Averaging latitude and longitude works only for points that are close together and away from the poles and the antimeridian. Because the Earth is a sphere, a plain average drifts off the true shortest path as the points get farther apart. This tool uses the spherical vector method, which stays correct everywhere.
How does the calculation work?
Each coordinate is turned into a point on a unit sphere, the two points are added as vectors, and the result is converted back to a latitude and longitude. Longitude is then normalised to the -180 to 180 range so the answer is always a valid coordinate, even when the points straddle the antimeridian.
Is the midpoint the fair meeting point by journey time?
It is the geographic middle, not necessarily the middle by road or by journey time. Terrain, road networks, and transport links can make a point that is geographically off-centre quicker to reach for both parties. Use the midpoint as a starting reference, then look at real routes.
What can I do with the midpoint coordinate?
Paste it into a map app to see what is nearby, use it to pick a rendezvous roughly between two locations, or feed it into the distance and bearing tools to confirm each leg. It is a coordinate like any other.
Educational reference only. The midpoint is a geographic centre, not necessarily the fastest meeting point by road or transit.