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GPS Midpoint Calculator

Find the geographic midpoint between two GPS coordinates.

Inputs

Saved Scenarios

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Midpoint Latitude

50.1886

Midpoint Longitude

1.1466

Spark says

Formula

φm=arctan⁡2 ⁣(sin⁡φ1+sin⁡φ2, (cos⁡φ1+Bx)2+By2)\varphi_m = \arctan2\!\left(\sin\varphi_1+\sin\varphi_2,\ \sqrt{(\cos\varphi_1+B_x)^2+B_y^2}\right)
B_x, B_y
— Intermediate great-circle midpoint terms

What is the GPS Midpoint Calculator?

This finds the point exactly halfway along the great-circle path between two coordinates — useful for planning a meeting point that's genuinely equidistant, not just the average of the two latitude/longitude numbers (which isn't the same thing on a sphere).

How to use it

  1. 1 Enter the first location's latitude and longitude.
  2. 2 Enter the second location's latitude and longitude.

Worked examples

London and Paris

Midpoint is about 50.1886, 1.1466 — near the English Channel/Somme area.

Try it

Limitations

  • •This is the geographic (great-circle) midpoint, not necessarily a convenient meeting point — travel time to that midpoint can differ significantly for each person depending on roads and transport options.

Frequently asked questions

Is the midpoint just the average of the two latitudes and longitudes?

No — because the Earth is a sphere, simply averaging coordinates gives a slightly different (and for longer distances, noticeably different) point than the true great-circle midpoint.

Sources & references