Finding antipode...
Enter any latitude and longitude to find the exact opposite point on Earth.
What Is an Antipodal Point?
An antipodal point is the location on Earth's surface that sits exactly opposite another location. If you could draw a straight line from your coordinate through the centre of Earth, the point where that line exits the other side is the antipode. This calculator turns any signed latitude and longitude into that opposite coordinate instantly.
Antipodal Point — Visual Reference
Flip latitude
North becomes south, south becomes north, and the equator stays at 0°.
Shift longitude 180°
Move halfway around the globe, then keep the result in the normal longitude range.
Map the opposite point
Open the result in a map to see the ocean, country, or nearest coastline.
How to Calculate the Opposite Point on Earth
The latitude part is simple: change the sign. A coordinate in the northern hemisphere moves to the same number of degrees south, and a coordinate in the southern hemisphere moves to the same number of degrees north. A point at the equator stays on the equator.
The longitude shifts by 180 degrees. If the original longitude is west, add 180 degrees. If it is east, subtract 180 degrees. The result is then normalized to the standard -180 to 180 degree range used by GIS software, GPS receivers, and web maps.
Antipode Formula for Latitude and Longitude
The formula works because opposite points on a sphere are separated by 180 degrees of central angle. Latitude flips across the equator, while longitude moves halfway around the globe. The special case of zero longitude can be represented as either 180° E or 180° W; this tool displays it as 180° E.
Why Most Antipodes Land in the Ocean
Earth has much more ocean than land, so most land locations have antipodes in water. Many cities in North America, Europe, and Africa point to remote parts of the Pacific, Indian, or Southern Ocean. True city-to-city antipodes are uncommon, which is part of what makes antipodal geography popular in classrooms, travel trivia, and map exploration.
New Zealand and Spain are a famous near-example: parts of New Zealand are close to the antipodes of Spain. Parts of Argentina and Chile also map near China and Mongolia. The calculator helps you check these relationships precisely instead of relying on a flat world map, where the geometry can be misleading.
Antipodal Points in Geography, Travel, and Education
Antipode calculations are used in geography lessons, GIS exercises, travel planning, and general map curiosity. Teachers use them to explain latitude, longitude, hemispheres, and the difference between globe geometry and flat projections. GIS users can use antipodal coordinates as clean test data because the math is deterministic and easy to verify.
Travelers often ask what country or ocean is on the opposite side of Earth from their home. This tool gives the coordinate, then links it to Google Maps and OpenStreetMap so you can inspect the terrain, nearest coastline, or closest named place.
Example Antipodal Coordinates
| Original place | Original coordinate | Antipodal coordinate |
|---|---|---|
| New York | 40.7128 N, 74.0060 W | 40.7128 S, 105.9940 E |
| London | 51.5074 N, 0.1278 W | 51.5074 S, 179.8722 E |
| Tokyo | 35.6895 N, 139.6917 E | 35.6895 S, 40.3083 W |
| Sydney | 33.8688 S, 151.2093 E | 33.8688 N, 28.7907 W |
Frequently Asked Questions
What does antipodal mean?
Antipodal means directly opposite on a sphere. In geography, an antipodal point is the coordinate exactly opposite another coordinate on Earth's surface.
How do I find the antipode of a coordinate?
Flip the sign of the latitude, then move the longitude 180 degrees and normalize it to the -180 to 180 degree range. This calculator performs those steps and formats the result as decimal degrees and DMS.
Is an antipode always on land?
No. Most antipodes fall in the ocean because oceans cover most of Earth. Many large cities have opposite points in the Pacific, Indian, or Southern Ocean.
How far away is an antipodal point?
Along Earth's surface, an antipodal point is half the planet's circumference away: about 20,015 km or 12,437 miles on a spherical Earth model.
Can two cities be antipodal?
Yes, but exact city-to-city antipodes are rare. Many examples are only approximate because a small coordinate difference on one side of Earth shifts the opposite point by the same surface distance.
Related Calculators
Lat/Long to DMS Converter
Convert antipodal coordinates to degrees, minutes, and seconds
Great Circle Midpoint Calculator
Find the midpoint between two latitude/longitude points
Haversine Distance Calculator
Calculate great-circle distance between coordinates
Coordinate Converter
Convert between common coordinate formats