What is Venus's mean radius in kilometers?

What is Venus’s mean radius in kilometers? Venus’s mean radius is 6051.8 kilometers.

Mean radius is the radius of a sphere with the same volume as the planet. Venus is almost spherical, so this value provides a useful single measurement even though its surface has small variations in elevation and its rotation causes little flattening.

Venus is very close to Earth in size, which is why it is sometimes called Earth’s sister planet. Its mean radius is about 95% of Earth’s mean radius, while its mass is about 82% of Earth’s mass. The similar size does not mean the two worlds have similar surface conditions.

Venus has a dense carbon-dioxide atmosphere, crushing surface pressure, and an average surface temperature hot enough to melt lead. Its atmosphere drives a powerful greenhouse effect. The value 6051.8 km should not be confused with Jupiter’s radius of about 69,911 km, Mars’s radius of about 3390 km, or Earth’s radius of about 6371 km.