What is the Gravity on Other Planets?
Compare surface gravity on every planet, the Moon, Pluto, and the Sun with this free gravity on other planets tool. See gravity in m/s², percent of Earth, and what you would weigh on each world. Includes planet detail mode with g = GM/r². Runs entirely in your browser with no signup.
How to use the Gravity on Other Planets
- Enter your mass on Earth in kg or pounds.
- View the comparison table of surface gravity on all celestial bodies.
- Switch to Planet Detail to explore one world with full g = GM/r² steps.
- See strongest and weakest gravity in the solar system.
- Copy the full comparison table and calculations.
Common use cases
- Comparing gravity on Mars vs Earth for a science project
- Finding how much a 150 lb person would weigh on Jupiter
- Learning which planet has the strongest and weakest surface gravity
Frequently asked questions
- What is the gravity on Mars compared to Earth?
- Mars surface gravity is about 3.72 m/s², roughly 38% of Earth's 9.81 m/s². A 70 kg person would weigh about 26.5 kg on Mars.
- Which planet has the strongest gravity?
- Jupiter has the strongest planetary surface gravity at about 24.8 m/s² — about 2.5 times Earth's. The Sun's surface gravity is much higher at about 274 m/s².
- How is surface gravity calculated?
- Surface gravity g = GM/r², where G is the gravitational constant, M is the body's mass, and r is its radius. NASA fact-sheet values are used for each body.
- Why is the Moon's gravity so weak?
- The Moon is much less massive and smaller than Earth. Its surface gravity is about 1.62 m/s² — only 17% of Earth's — which is why astronauts could jump easily there.
