Diameter of Jupiter
The average diameter of Jupiter is 139,822 km or 86,881 miles (radius 69,911 km or 43,440 miles). The reason why it is an average is because the diameter is not exactly the same when measured from all end points. The diameter of Jupiter’s equator is 142,984 km or 88,846 miles (radius 71,492 km or 44,423 miles). The diameter when measured from pole to pole is 133,708 or 83,082 miles (radius 66,854 km or 41,541 miles). It is the quick rotation of Jupiter (9 hours and 55 and half minutes for full rotation) which causes this widening at the equator.
When compared to the Earth’s average diameter (12,742 km or 7,917 miles), Jupiter’s average diameter is 10.97 times larger. Jupiter’s equator diameter is 11.21 times larger than Earth’s equator diameter (12,756.2 km or 7,926 miles). Jupiter’s pole to pole diameter is 10.52 times larger than Earth’s pole to pole diameter (12,713.6 km or 7,900 miles).

