GPS Toolset Antipodes calculator
Pick a point on the left map. The right map shows the place on the other side of the Earth.
- Two maps, one point
- Opposite through the Earth
- Nothing uploaded
An antipode is the point you would reach by drilling straight through the centre of the planet. This antipodes calculator marks that point and moves the map so you can see what is there: coast, city, or open ocean.
Open the maps
The screen is split in two. Click the left map. The right map moves to the opposite point.
How to find the other side of a point
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1
Click the left map
Zoom to the place you care about, then click. The left map centres on that point and marks it. Drag the marker if you want to nudge it.
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2
Read the opposite point
The right map pans to the antipode and marks it. The coordinates of both points sit under the maps.
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3
Look at what is there
Zoom the right map to see the coast, a city, or empty ocean. My location uses this browser’s position, and only if you allow it.
How the opposite point is calculated
Latitude changes sign, so north becomes south and south becomes north. Longitude moves halfway around the planet, by 180°. A place just east of Greenwich has its opposite just west of the date line.
The Eiffel Tower is 48.8584° N, 2.2945° E. Its antipode is 48.8584° S, 177.7055° W, in the South Pacific, south-east of New Zealand. Most of Europe and Africa land in that ocean. Eastern China more often lands in South America, because the Pacific is narrower there.
The two maps use the same zoom when you pick a point, so a city-scale click shows the other side at city scale, and a wide view stays wide.
Privacy
There is no account and no upload. The point stays in this browser tab. Closing the tab drops it. The map pictures load so the maps can draw. The coordinates are not saved as a place on a server.
Questions
What is an antipode?
The antipode of a point is the place you would reach by going straight through the centre of the Earth and out the other side. On the map, latitude flips from north to south, and longitude shifts by 180°.
Why is the other side often ocean?
Oceans cover most of the planet, and the Pacific sits opposite much of Europe, Africa, and the Atlantic. Land opposite land is less common. A point in eastern China can fall in South America. A point in western Europe often falls in the South Pacific.
Is the point uploaded?
No. The point stays in this browser tab. GPS Toolset does not take an account and does not store the place you picked.
What if location is blocked?
My location is optional. If the browser blocks it, click the left map instead.
Will this work on a phone?
Yes. The map you pick on sits above the opposite side. Tap to place the point. Drag the marker to move it.
More on GPS Toolset
Convert the coordinates between decimal degrees, DMS, UTM, and MGRS. Measure distance on a map when you want the length between two places instead of the point opposite one of them.