A year is one trip around the Sun, and every planet takes a different time. Enter your birthday to see how old you are on each planet and when your next birthday there will be. A fun way to explore the solar system with kids.
loading toolHow to find your age on other planets
- Enter your date of birth.
- See your age on every planet.
- Look for your next birthday on each one.
Good to know
- Ages use each planet’s orbital period in Earth years, e.g. Mars 1.88 and Jupiter 11.86.
Questions
Why am I so old on Mercury?
Mercury goes round the Sun in just 88 Earth days, so it has had about four birthdays for each of yours.
Why is my Neptune age less than 1?
Neptune takes nearly 165 Earth years to go round the Sun once, so nobody alive has had a Neptune birthday yet.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
