What is the equatorial diameter of Saturn in kilometers?

Saturn’s equatorial diameter is 120,536 kilometers, measured at the planet’s cloud tops. This makes Saturn roughly 9.4 times wider than Earth at the equator.

Saturn does not have a solid surface like Earth, so its diameter is defined using reference levels in its atmosphere. The planet’s rapid rotation causes its equator to bulge outward while flattening the poles. As a result, Saturn’s polar diameter is only about 108,728 kilometers—nearly 12,000 kilometers less than its equatorial diameter.

This pronounced flattening makes Saturn the most visibly oblate planet in the Solar System. Its low average density, about 0.69 times that of water, also reflects its composition: Saturn is a gas giant made mostly of hydrogen and helium. Despite being about 764 times Earth’s volume, it contains only around 95 Earth masses.

The figure is often confused with Saturn’s ring-system dimensions or with Jupiter’s diameter. The 120,536-kilometer value refers to Saturn itself, measured across its equator, and excludes the rings. Different sources may round it to about 120,500 kilometers.