Weight on Other Planets Calculator
See what you would weigh on the Moon, Mars, Jupiter and the other planets, and why your mass does not change.
🪐 What is a Weight on Other Planets Calculator?
A weight on other planets calculator tells you what a given person or object would weigh on the Moon, Mars, Jupiter or any other world. Weight is the force with which gravity pulls on a mass, W = m g, so it depends on the local gravitational acceleration g. Because g differs from one body to the next, the same mass has a different weight on each. The Moon pulls with 1.62 m/s², Mars with 3.721 m/s² and Jupiter with about 23.1 m/s², compared with the standard 9.80665 m/s² on Earth. Multiply your Earth weight by the ratio of the two gravities and you have the answer.
The idea is used in classrooms, science museums, astronaut training talks and space writing. Teachers use it to separate mass from weight, mission planners use the same ratio to estimate the load on landing gear, rover wheels and a person carrying a backpack, and fiction writers use it to check how high a character could jump on a small world. Fitness and film audiences love the headline numbers: a 70 kg person would feel about 11.6 kg on the Moon, which is why the Apollo astronauts could carry heavy suits and still hop around.
The most common misunderstanding is that you would lose mass on the Moon. You would not. Your mass is the amount of matter in you and is the same everywhere, so you would be just as hard to push sideways in space as you are on Earth. Only the downward pull changes. A second point is that a bathroom scale really measures force and shows it as a mass using Earth gravity, so on the Moon it would display a smaller number even though your mass is unchanged. Finally, Jupiter, Saturn, Uranus and Neptune have no solid surface. NASA lists their gravity at the 1 bar pressure level, so those weights are a thought experiment about the cloud tops, not a place you could stand.
This calculator offers two modes. One body compares Earth with a single world, including a custom gravity option, and shows the weight as an Earth scale equivalent, the true force in newtons and the ratio to Earth. All planets lists every body at once with a surface gravity table and comparison bars so you can see the pattern in one glance.
📐 Formula
📖 How to Use This Calculator
Steps
💡 Example Calculations
Example 1 — A 70 kg Person on the Moon
70 kg on the Moon, g = 1.62 m/s²
Example 2 — A 150 lb Person on Mars
150 lb on Mars, g = 3.721 m/s²
Example 3 — Every Planet for an 80 kg Person
80 kg, all planets mode
Example 4 — A Custom Gravity of 24.79 m/s²
60 kg on a body with g = 24.79 m/s² (the mean Jupiter value quoted by some references)
❓ Frequently Asked Questions
🔗 Related Calculators
How much would I weigh on the Moon?
You would weigh about 16.5 percent of your Earth weight, because lunar surface gravity is 1.62 m/s2 against 9.80665 m/s2. A 70 kg person has a lunar weight force of 113.4 N, which an Earth scale would show as 11.56 kg.
How much would I weigh on Mars?
About 38 percent of your Earth weight, since Mars has a surface gravity of 3.721 m/s2. A 150 lb person would read 56.92 lb on an Earth calibrated scale, with a weight force of 253.2 N.
How much would I weigh on Jupiter?
About 2.36 times your Earth weight at the 1 bar level, using the NASA figure of 23.1 m/s2. An 80 kg person would read 188.44 kg equivalent. Jupiter has no solid surface, so this is a cloud level value.
What is the formula for weight on another planet?
Weight on a body is W = m g, so the weight ratio equals the gravity ratio: W_body = W_Earth x g_body / 9.80665. Use the same unit for both weights.
Does my mass change on other planets?
No. Mass is the amount of matter in your body and stays the same everywhere. Only the weight force m g changes with the local gravitational acceleration.
Which planet has the strongest surface gravity?
Jupiter, at about 23.1 m/s2 (2.36 times Earth) at the 1 bar level. Among the planets with solid surfaces Earth is highest, with Venus close behind at about 8.9 m/s2.
Which planet has the weakest gravity?
Of the eight planets, Mercury and Mars are weakest at about 3.7 m/s2, roughly 38 percent of Earth. The Moon is lower still at 1.62 m/s2, about 16.5 percent of Earth.
Why is the gravity on Uranus lower than on Earth if it is so much bigger?
Surface gravity is g = G M / r squared. Uranus has about 14.5 Earth masses but a radius about four times larger, and gravity falls with the square of radius, so g ends up near 8.7 m/s2, slightly below Earth.
Can I enter my weight in pounds?
Yes. Choose lb in the unit selector and type your weight. The result is shown in pounds as an Earth scale equivalent, and the weight force in newtons uses 0.45359237 kg per lb.
Why do some sites list a different gravity for Jupiter?
Gas giants have no surface, so values depend on the reference level and on whether rotation is included. NASA lists 23.1 m/s2 at the equator at 1 bar, while other references quote a mean value near 24.79 m/s2.
Is the scale reading the same as my real weight?
Not exactly. A scale measures force and displays it as a mass equivalent using Earth's gravity. On the Moon an Earth calibrated scale would show 16.5 percent of your mass, though your true mass is unchanged.