Planet Gravity Calculator
Use this planet gravity calculator to estimate how much you would weigh on different planets and moons in our solar system. This educational astronomy tool explains how gravity changes across worlds with different masses and sizes.
Gravity Results
Understanding Planetary Gravity
Gravity is the force that pulls objects toward the center of a planet, moon, or star. Every object with mass produces gravity, but larger planets usually create stronger gravitational forces.
Your mass stays constant everywhere, but your weight changes depending on the gravitational pull of the planet you stand on.
Why Gravity Changes Between Planets
Planetary gravity depends mainly on two factors: mass and radius. Massive planets create stronger gravitational pull, but size also matters because gravity weakens farther from the planet’s center.
This is why some giant planets may not feel as overwhelmingly heavy as expected despite their enormous mass.
Planet Gravity Comparison
| Planet or Moon | Gravity Compared to Earth |
|---|---|
| Mercury | 38% of Earth gravity |
| Venus | 91% of Earth gravity |
| Mars | 38% of Earth gravity |
| Jupiter | 234% of Earth gravity |
| Moon | 17% of Earth gravity |
How Lower Gravity Changes Movement
On worlds with lower gravity, people could jump higher, move more easily, and lift heavier objects. Astronauts on the Moon demonstrated this during the Apollo missions.
In stronger gravity environments, movement becomes more difficult because the body experiences increased downward force.
Gravity and Space Exploration
Understanding planetary gravity is essential for spacecraft landing, rocket launches, astronaut survival, and future space colonization missions.
Scientists also study gravity to learn about planetary interiors, density, and the formation of planets and moons.
Planet Gravity Calculator FAQ
Why does weight change on different planets?
Weight changes because each planet has a different gravitational pull depending on its mass and size.
Does mass change on other planets?
No. Your mass stays the same everywhere, but your weight changes because gravity changes.
Which planet has the strongest gravity?
Jupiter has the strongest gravity among the planets in our solar system.
Why is gravity weaker on the Moon?
The Moon has much less mass than Earth, so it produces weaker gravitational force.
Could humans jump higher on Mars?
Yes. Mars has lower gravity than Earth, so people could jump higher and move more easily there.
How do scientists measure planetary gravity?
Scientists use orbital motion, spacecraft tracking, and planetary mass measurements to calculate gravity.