Weight and Age on Other Worlds
Enter a weight and an age to see them on every planet, plus the Moon and Pluto.
| World | Weight there | Gravity vs Earth | Age in that world's years |
|---|
How this works
Mass, the amount of matter in a body, stays the same everywhere. Weight is the pull of gravity on that mass, so it changes with each world's surface gravity. The table multiplies the entered weight by the ratio of surface gravity to Earth's. Age uses the time each world takes to orbit the Sun once, so a planet with a longer year gives a smaller number.
Jupiter, Saturn, Uranus and Neptune have no solid surface. Their gravity is given at the 1-bar pressure level, which is the reference level the NASA fact sheets use. The Moon's "year" is the Earth's orbit around the Sun, which the Moon shares, so its age is the same as on Earth.
Sources
- NASA Goddard (NSSDC). Mercury Fact Sheet. 2024-01-11. Accessed October 8, 2026.
- NASA Goddard (NSSDC). Venus Fact Sheet. 2024-01-11. Accessed October 8, 2026.
- NASA Goddard (NSSDC). Earth Fact Sheet. 2024-11-15. Accessed October 8, 2026.
- NASA Goddard (NSSDC). Moon Fact Sheet. 2024-01-11. Accessed October 8, 2026.
- NASA Goddard (NSSDC). Mars Fact Sheet. 2025-05-19. Accessed October 8, 2026.
- NASA Goddard (NSSDC). Jupiter Fact Sheet. 2024-10-02. Accessed October 8, 2026.
- NASA Goddard (NSSDC). Saturn Fact Sheet. 2025-03-18. Accessed October 8, 2026.
- NASA Goddard (NSSDC). Uranus Fact Sheet. 2024-10-02. Accessed October 8, 2026.
- NASA Goddard (NSSDC). Neptune Fact Sheet. 2024-10-03. Accessed October 8, 2026.
- NASA Goddard (NSSDC). Pluto Fact Sheet. 2024-01-11. Accessed October 8, 2026.