What is the equatorial diameter of Jupiter in kilometers?

The equatorial diameter of Jupiter is 142,984 kilometers. This measurement spans Jupiter across its widest region, around the planet’s equator, rather than from pole to pole.

Jupiter is not a perfect sphere because it rotates extremely quickly. One Jovian day lasts about 9 hours 56 minutes, and that rapid rotation pushes material outward around the equator while slightly flattening the poles. As a result, Jupiter’s equatorial diameter is larger than its polar diameter, which is about 133,700 kilometers.

The figure is also much larger than Earth’s diameter of roughly 12,742 kilometers, making Jupiter about 11 times wider than Earth. A common mix-up is confusing diameter with radius: Jupiter’s equatorial radius is about 71,492 kilometers, so doubling it gives the quoted diameter. The exact value can vary slightly by reference because Jupiter has no solid surface and its visible edge depends on the pressure level used for measurement.