Weight on Other Planets Calculator
Your weight on any planet depends on that planet's surface gravity relative to Earth's. Weight is simply the force gravity exerts on your mass: W = m * g. Because the gravitational acceleration g differs from body to body, your weight changes even though your mass stays constant. This calculator uses NASA-published surface gravity values for every planet in the solar system plus the Moon and Pluto. Enter your Earth weight in pounds (or kilograms) and select a destination to instantly see your equivalent weight there.
Weight on other planets formula
W(planet) = W(Earth) * (g(planet) / g(Earth))
Where g(Earth) = 9.81 m/s squared. The gravity ratio is the planet's surface gravity divided by Earth's surface gravity. For example, Mars has g = 3.72 m/s squared, giving a ratio of 3.72 / 9.81 = 0.379.
Surface gravity across the solar system
Surface gravity values from NASA: Mercury 3.70 m/s squared, Venus 8.87, Earth 9.81, Moon 1.62, Mars 3.72, Jupiter 24.79, Saturn 10.44, Uranus 8.69, Neptune 11.15, Pluto 0.62. Gas giants use the 1-bar pressure level as the reference surface. These values are mean equatorial figures; actual gravity varies slightly with latitude and local geology on solid bodies.
Weight on other planets: frequently asked questions
Why do I weigh less on Mars than on Earth?
Mars has a surface gravity of about 3.72 m/s squared, compared to Earth's 9.81 m/s squared. That is roughly 38% of Earth's gravity, so you would weigh about 38% of your Earth weight on Mars.
Does my mass change on other planets?
No. Your mass, measured in kilograms, stays the same everywhere in the universe. Weight is the force gravity exerts on your mass (W = mg), so it changes depending on the local gravitational acceleration.
Why is the weight on Jupiter so much higher?
Jupiter's surface gravity is about 24.79 m/s squared, roughly 2.53 times Earth's. Jupiter is so massive that even though it has no solid surface, the gravitational pull at its cloud tops is much stronger than Earth's.
What about the Moon and Pluto?
The Moon's surface gravity is about 1.62 m/s squared (16.5% of Earth's). Pluto's is only about 0.62 m/s squared (6.3% of Earth's). This calculator includes both as selectable bodies.
How accurate are these gravity values?
Surface gravity values are sourced from NASA planetary fact sheets. They represent standard mean surface values. For gas giants, the value is taken at the 1-bar atmospheric pressure level, the conventional reference.
Official sources
- NASA Planetary Fact Sheets: nssdc.gsfc.nasa.gov/planetary/factsheet/.
- NASA Solar System Exploration: solarsystem.nasa.gov.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.