Planet Age Calculator
Find out how old you'd be on Mercury, Venus, Mars, Jupiter, Saturn, Uranus or Neptune, calculated using each planet's real orbital period.
A year is the length of one orbit
A "year" on any planet is simply the time it takes to complete one trip around the Sun. Mercury takes only 88 Earth days, while Neptune takes almost 165 Earth years — that's why you'd have far more "years" on Mercury than on Earth, and far fewer on Neptune.
Real astronomical data
The orbital periods used (Mercury 87.97 days, Venus 224.70, Mars 686.98, Jupiter 4332.59, Saturn 10759.22, Uranus 30688.5, Neptune 60182) are the standard sidereal values published by public astronomical sources — not an invented approximation.