Earth Radius

The Earth’s radius is one of the key measurements used in geography and astronomy. It defines the size of our planet and serves as a base for calculating distances, gravity, and satellite orbits.

The average radius of Earth is approximately 6,378.137 kilometers or 3,963.19 miles.

You can use our online converter calculator to easily convert the Earth's radius into miles, kilometers, or other units. This makes it simple to understand and compare Earth’s size with other planets in the solar system.

Fun fact: Earth is not a perfect sphere - it’s slightly flattened at the poles and bulges at the equator. The equatorial radius is about 6,378.1 km, while the polar radius is about 6,356.8 km.