what is the radius of the earth?
The average radius of the Earth is approximately 6,371 kilometres (km) or 3,959 miles.
Since the Earth is not a perfect sphere but an oblate spheroid (slightly flattened at the poles and bulged at the equator), its radius varies slightly:
Key Values:
Equatorial Radius: 6,378 km
Polar Radius: 6,357 km
Mean Radius: 6,371 km
The Earth's radius is an important measurement used in geography, astronomy, navigation, and satellite technology.
In simple terms: The Earth is about 6,371 km from its centre to its surface on average.