Planetary Weight Calculator
Find out how much you would weigh on every planet in the solar system, on the Moon, and on the Sun. Enter your Earth weight and explore the gravity of each celestial body.
Gravity: 1.00 (reference)
On Mercury, a single day lasts longer than a whole year!
Venus spins in the opposite direction compared to most other planets.
You could jump 6 times higher on the Moon than on Earth.
Mars is home to Olympus Mons, the tallest volcano in the solar system (21 km high).
Jupiter is so massive it could fit 1,300 Earths inside it.
Saturn is so light it would float in a giant bathtub!
Uranus is tilted at 98°: it literally rolls along its orbit.
Winds on Neptune reach 2,100 km/h, the fastest in the solar system.
On Pluto, you would weigh barely more than a house cat!
On the Sun, you would be crushed by gravity 28 times stronger than Earth's.
How does it work?
Your mass stays the same everywhere in the universe (70 kg). What changes is your weight, which depends on the local gravity.
Weight is calculated as follows: Weight = Mass x Relative gravity
For example, on Mars: 70 kg x 0.38 = 26.6 kg
Did you know?
With a mass of 70 kg, you would weigh only 4.4 kg on Pluto — barely the weight of a house cat! Conversely, on the Sun, you would weigh 1953 kg. It would take 28 people to match your solar weight on Earth.
Everything you need to know about your weight on other planets
Why calculate your weight on other planets?
Gravity varies dramatically from one celestial body to another: from 0.063 g on Pluto to 27.9 g on the Sun. This calculator lets you see exactly how these differences affect your weight.
Understanding the distinction between mass and weight is a fundamental concept in physics. Your mass stays the same everywhere in the universe, but your weight changes depending on local gravity.
This simulator offers a virtual journey through the solar system with accurate scientific data and fascinating facts about each planet, the Moon, and the Sun.
Who uses this planetary weight calculator?
- Physics teachers
- Illustrate the concepts of gravity, mass, and weight with an interactive tool that makes astronomy tangible for students at every level.
- Astronomy enthusiasts
- Explore the gravitational characteristics of each planet in the solar system and compare them visually through progress bars.
- Science fiction writers
- Get realistic data on planetary gravity to make your stories more believable and scientifically consistent.
- Science students
- Verify your physics calculations on gravity and intuitively understand why an astronaut can jump higher on the Moon than on Earth.
How does the planetary weight calculator work?
Enter your Earth weight in kilograms. The calculator uses this weight as the reference point (gravity = 1.00).
Your weight is multiplied by the relative gravity of each celestial body. For example, Mars has a gravity of 0.38: a 70 kg person would weigh 26.6 kg there.
Results are displayed with proportional visual bars, heavier/lighter indicators, and scientific facts for each celestial body.
Frequently asked questions about weight and planetary gravity
- What is the difference between mass and weight?
- Mass (in kg) is the amount of matter in an object and remains constant everywhere. Weight is the force exerted by gravity on that mass. On the Moon, your mass is the same but your weight is 6 times lower.
- On which planet would you be the lightest?
- On Pluto (if included), with a gravity of just 0.063 g. A 70 kg person would weigh only 4.4 kg there. Among the official planets, you would be lightest on Mars or Mercury (0.38 g).
- Why does Jupiter have such strong gravity?
- Jupiter is the most massive planet in the solar system, with a mass 318 times greater than Earth's. Its surface gravity is 2.34 g, meaning you would weigh more than twice your Earth weight there.
- Could you walk on every planet?
- No. Jupiter, Saturn, Uranus, and Neptune are gas giants with no solid surface. You could only walk on the rocky planets (Mercury, Venus, Mars) and on the Moon or Pluto.
- How does gravity affect astronauts in space?
- In Earth orbit, astronauts are in continuous free fall, which creates a sensation of weightlessness (microgravity). This causes a loss of muscle and bone mass of about 1 to 2% per month without regular physical exercise.