Antipode Calculator
Find the point on the opposite side of Earth from any location
Select Location
Mount Everest Summit
Highest peak on Earth
27.988°, 86.925°
New York City
The Big Apple
40.713°, -74.006°
London, UK
Prime Meridian passes through Greenwich
51.507°, -0.128°
Sydney, Australia
Harbor City Down Under
-33.869°, 151.209°
Tokyo, Japan
Land of the Rising Sun
35.676°, 139.650°
São Paulo, Brazil
Largest city in South America
-23.550°, -46.633°
Custom Location
Enter your own coordinates
Manual input
Input Coordinates
North: positive (+), South: negative (-)
East: positive (+), West: negative (-)
Current Input Coordinates
Antipode Results
Antipode Location Type
Likely in ocean (most common)
About 85% of land points have oceanic antipodes
Distance Information
Straight-line distance through Earth: ~12,742 km (Earth's diameter)
Surface distance: ~20,037 km (half of Earth's circumference)
Flight distance: Varies, but requires crossing multiple continents/oceans
📐 Antipode Formula
Latitude Calculation
θₐ = -θ
Simply change the sign
Longitude Calculation
If φ ≤ 0: φₐ = φ + 180°
If φ > 0: φₐ = φ - 180°
Where:
θ = latitude, φ = longitude
ₐ = antipode coordinates
🗺️ Coordinate Systems
Decimal Degrees
Most common format: 40.7128, -74.0060
Degrees, Minutes, Seconds
Traditional format: 40°42'46.1"N, 74°0'21.6"W
Sign Convention
N/E: positive (+), S/W: negative (-)
🌍 Earth & Antipode Facts
Ocean Dominance
71% of Earth's surface is water, so most antipodes are in oceans
Land Antipodes
Only ~15% of land points have land antipodes
Temperature Theorem
At any moment, some antipodal points have the same temperature
Earth Sandwich
People have made "Earth sandwiches" by placing bread at antipodal points
Understanding Antipodes
What is an Antipode?
An antipode is the point on Earth's surface that is diametrically opposite to a given location. If you could drill a straight tunnel through the center of the Earth, you would emerge at the antipode of your starting point.
Etymology and History
- 📚Greek Origins: "Anti" (opposite) + "pous" (foot) = opposite feet
- 🌍Ancient Knowledge: Greeks knew Earth was spherical and calculated its size
- 🏛️Medieval Myths: People imagined upside-down people with feet for heads
- 🗺️Terra Australis: Hypothetical southern continent that attracted explorers
Mathematical Calculation
Coordinate System
- • Latitude (θ): -90° (South Pole) to +90° (North Pole)
- • Longitude (φ): -180° (West) to +180° (East)
- • Prime Meridian: 0° longitude passes through Greenwich, London
Formula Application
- • Latitude: Simply negate the original value
- • Longitude: Add or subtract 180° depending on hemisphere
- • Result: Point exactly opposite on Earth's surface
Fun Fact: The British Empire's claim that "the sun never sets" was nearly true because Britain and New Zealand are almost antipodal, ensuring daylight somewhere in the empire at all times.