The Jupiter radius is a unit of length used in astronomy to describe the radii of gas giants and some exoplanets.

The general shape of the planet Jupiter has been directly measured from radio occultations of passing spacecraft, starting with the Pioneer and Voyager missions.

The planet Jupiter has the approximate shape of an oblate spheroid, which is mainly set by the rate of rotation.

Density fluctuations within the planet can create variations in the equatorial radius of up to 30 km.

[3] In 2015, the International Astronomical Union defined the nominal equatorial Jovian radius to remain constant regardless of subsequent improvements in measurement precision of RJ.