How Old Are You on Mars? Explore Your Age Across the Solar System!

See your age, weight, and next birthdays on every planet. A fun way to travel the cosmos - without leaving Earth!

Age Calculator

Date of Birth

Your Age (Years)

Weight on Earth (kg) - Optional

Planet	Your Age	Day Length	Year Length	Weight
Enter your birth date or age to see results

Calculate your age first to see upcoming planetary birthdays!