Planet
Your Age on Mercury
Mercury races around the Sun in just 88 days, making it the fastest planet.
Enter your birth date
See your Mercuryage, next birthday, and milestones.
Mercury
87.97Earth days per year
3.7Surface gravity (m/s²)
0Moons
Frequently Asked Questions
How long is a year on Mercury?
One Mercury year is 87.97 Earth days — that is how long Mercury takes to orbit the Sun.
How is my Mercury age calculated?
We divide the days you have been alive by 87.97, the length of a Mercury year in Earth days.
When is my next Mercury birthday?
Your next Mercury birthday happens when you complete another full orbit's worth of Earth days — roughly every 88 days.