Find your age on other planets

Use these extra birthdays as an excuse to celebrate!

Enter your date of birth:

This site answers these burning questions:

• How old are you on the other planets?
• When are your next birthdays on the other planets?
• How many days/weeks old are you?
• What birthdays are coming up?

Why is my age different on other planets?

One year is usually taken to mean an Earth year, the time taken for the Earth to revolve around the Sun. However, since each planet takes a different amount of time to revolve around the Sun, a year is not the same length of time on different planets. This means your age is different when measured in years on different planets.