Weight on Other Planets
Calculate your weight on Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune. Enter your Earth weight and see how gravity shifts across the solar system.
About This Calculator
The Weight on Other Planets Calculator lets you discover how much you would weigh on every planet and major celestial body in our solar system. Simply enter your weight on Earth in kilograms, and the calculator uses the standard physics formula W = m × g (weight equals mass times surface gravity) to compute your weight on each planet. This tool is perfect for students learning about gravity, space enthusiasts planning imaginary missions, or anyone curious about the differences in gravitational pull across the solar system.
The calculation works by first finding your mass from your Earth weight using the equation m = W_earth / g_earth, where Earth's gravitational acceleration is 9.81 m/s². This mass is then multiplied by the surface gravity of each planet as measured by NASA's Planetary Fact Sheet. For example, Jupiter's surface gravity of 24.79 m/s² means you would weigh about 2.5 times more than on Earth, while Mercury's 3.70 m/s² gravity means you would weigh only about 38% of your Earth weight. The results include all eight planets, the Moon, and the Sun for comparison, displayed in newtons (N) — the scientific unit of force.
Regional Notes
India (IN): Body weight is commonly measured in kilograms in India. The standard value of g = 9.81 m/s² is used in Indian physics textbooks and competitive exams. The results are universally applicable since gravity is a physical constant independent of location on Earth.
United States (US): While weight is often measured in pounds in daily life, the calculator uses kilograms for consistency. To convert your weight from pounds to kilograms, divide by 2.205. The default of 154 lb (70 kg) is provided for US users. Results are shown in newtons, the standard SI unit for force used in physics education.
United Kingdom (UK): The UK uses kilograms for body weight and newtons in physics education, consistent with the SI system. The planetary gravity values are sourced from NASA and are internationally recognized, ensuring accurate results for all users regardless of location.
Frequently Asked Questions
How do you calculate weight on other planets?
Your weight on another planet is calculated using the formula W = m × g, where m is your mass and g is the surface gravity of that planet. Your mass is first found by dividing your Earth weight by Earth's gravity (9.81 m/s²). This mass is then multiplied by each planet's surface gravity to find your weight there.
Why does my weight change on different planets?
Weight changes because different planets have different surface gravity, which depends on their mass and radius. A larger planet like Jupiter has much stronger gravity than Earth, so you would weigh over two and a half times more there. Smaller planets like Mercury have weaker gravity, so you would weigh less.
Does my mass change when I go to another planet?
No, your mass stays the same wherever you go in the universe. Mass is a measure of the amount of matter in your body and does not change. Only your weight changes because gravity differs from planet to planet.
Would I weigh more on Jupiter or Saturn?
You would weigh significantly more on Jupiter than on Saturn. Jupiter has a surface gravity of about 24.8 m/s², which is 2.5 times Earth's gravity, while Saturn has about 10.4 m/s², roughly equal to Earth's gravity.
Is the weight the same on the Moon as on Earth?
No, you would weigh about one-sixth of your Earth weight on the Moon. The Moon's surface gravity is only 1.62 m/s² compared to Earth's 9.81 m/s². A person weighing 70 kg on Earth would weigh only about 11.6 kg on the Moon.
What planet has the strongest gravity?
Jupiter has the strongest surface gravity in our solar system at about 24.8 m/s², followed by Neptune at 11.2 m/s² and Saturn at 10.4 m/s². The Sun has the strongest gravity overall at 274 m/s², but it is a star, not a planet.
Can I use pounds instead of kilograms?
Enter your weight in kilograms. If you know your weight in pounds, divide by 2.205 to convert to kilograms. The results show your weight in newtons (the scientific unit of force) on each planet.
What if I weigh 100 kg on Earth how much would I weigh on Mars?
If you weigh 100 kg on Earth, you would weigh about 37.8 kg on Mars. Mars has approximately 38% of Earth's surface gravity because it is smaller and less massive than Earth.