This little calculator allows you to calculate how old you would be on each of the planets in the solar system, and what your weight would be. If you have weight issues, don't look at the result for Jupiter!
The results are based on surface gravity, which for the gas and ice-giants is somewhat less than you might think. Data is taken from NASA/JPL
N.B. None of this information is stored or even sent to my server, it's calculated in your browser