Earth Polar Radius
The Earth's polar radius is the distance from the center of the Earth to the North or South Pole. It measures the Earth’s radius along its rotational axis.
Its value is approximately 6,356.8 kilometers (about 3,949.9 miles).
The Earth is an oblate spheroid, so the polar radius is slightly shorter than the equatorial radius due to the planet's flattening at the poles.
This measurement is crucial for geodesy, understanding Earth’s shape, and satellite navigation.
Key facts:
Polar radius ≈ 6,356.8 km
Smaller than equatorial radius by about 21.3 km
Important for precise Earth modeling and mapping
The difference between the polar and equatorial radius reflects the Earth’s rotation and its effect on the planet’s shape.
Statute League
A statute league is a traditional unit of distance used primarily on land and defined as 3 statute miles, which equals about 4.83 kilometers or 15,840 feet. It was commonly used in English-speaking countries for measuring distances before the metric system became widespread. The statute league is different from the nautical league, which is based on nautical miles and used at sea. Although largely obsolete today, the statute league is still found in historical texts and older maps.
No conversions available for length.