Free Weight Calculator

Find your weight (force) on Earth or other planets.

Your mass stays the same everywhere in the universe, but your weight (the force gravity exerts on that mass) changes based on local gravity — you'd weigh about 38% of your Earth weight on Mars, or 166% on Jupiter (if it had a solid surface to stand on).

Worked Example

Example: A 70 kg person weighs about 686 N on Earth, but only about 260 N on Mars (38% of Earth gravity).

Formula / Method

Weight (N) = Mass (kg) × Gravity (m/s²). Earth gravity = 9.81 m/s²; other bodies use their respective surface gravity.

Worked Example

Example: A 70 kg person weighs about 686 N on Earth, but only about 260 N on Mars (38% of Earth gravity).

Formula / Method

Weight (N) = Mass (kg) × Gravity (m/s²). Earth gravity = 9.81 m/s²; other bodies use their respective surface gravity.