Q:

How many miles is the Earth's diameter?

A:

Quick Answer

The diameter of the Earth is 7,926 miles at the equator; however, if the diameter of the Earth is measured through the North and South Poles, the diameter is only 7,901 miles. This length is slightly shorter than the width.

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Full Answer

Although the Earth has a sphere-like shape, the rotation of the Earth has caused the planet to flatten out slightly. For that reason, the Earth has a larger diameter at the equator. The diameter of the Earth varies as a result of a tiny bulge located at the equator. This bulge is called an ellipsoid or, more accurately, a geoid.

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