How fast does Jupiter rotate?
Short answer: About 43,000 kilometers/hour (26,700 miles/hour)
Long answer: The planet Jupiter is not a solid sphere, it's a gas giant. Different parts of Jupiter rotate at different speeds, with the equator rotating slightly faster than the polar regions.
This means that the length of a day on Jupiter varies depending on the latitude. Near the poles it's about 9 hours and 56 minutes, closer to the equator it's 9 hours and 50 minutes.