Age on Other Planets Calculator
On Earth, we define a "year" as 365.25 days. However, in our solar system, every planet has a different orbital period. If you were living on Mercury, you would celebrate birthdays every 88 Earth days! On Neptune, you likely wouldn't even have reached your first birthday yet.
This tool translates your Earth birth date into the orbital cycles of other planets. It’s a profound way to visualize the relativity of time, much like seeing your age in seconds. While you might be an adult on Earth, you are a mere infant on Saturn. Compare your cosmic age with your Biological Age to see how time scales vary.
Celestial FAQ
How old am I on Mars?
Enter your birth date above to see! For your Earth age in detail, visit the Age Calculator.
Why is my age different on each planet?
Every planet takes a different amount of time to orbit the Sun. Read more about time measurement on our Age Hub.
Can I see my age in seconds on Jupiter?
We provide years here, but you can convert your Earth Seconds using planetary ratios.
What is my "Galactic Age"?
That is your age based on the Sun's orbit of the galaxy. See our Milestones for other massive time units.
When is my next Martian birthday?
Use this tool to find your Martian age, then set a countdown for your Earth one.
Does this work for Pluto?
Yes, we include Pluto! To see time since Pluto was discovered, use our Historical Age Tool.