Antipode Calculator
Find the point on the opposite side of the Earth.
The antipode is the point diametrically opposite you through the Earth's center.
The math behind it
Negate the latitude and shift the longitude by 180 degrees.
Worked example
New York (40.71, -74.01) has its antipode near (−40.71, 105.99) in the Indian Ocean.
FAQ
If I dug straight down...
You'd come out at the antipode (usually ocean - most land has watery antipodes).