Weight on Other Planets Calculator — Your Weight on Mars, Moon & More
Ever wondered how much you would weigh on Mars, the Moon, or Jupiter? Enter your Earth weight below and this calculator instantly shows your weight on all 8 planets, the Moon, Pluto, and the Sun — using NASA Planetary Fact Sheet gravity data. Your mass never changes; only the gravitational force pulling on you does. Use the formula Wplanet = Wearth × gratio where gratiois each body's gravity relative to Earth.
Weight on Other Planets
Frequently Asked Questions
How much would I weigh on Mars?
Mars has a surface gravity of 3.72 m/s², which is about 37.7% of Earth's gravity (9.81 m/s²). To find your weight on Mars, multiply your Earth weight by 0.377. For example, a 150-pound person would weigh about 56.6 pounds on Mars, or roughly 25.6 kg if they normally weigh 68 kg. Mars's lower gravity is due to its smaller mass — it is only about 10.7% as massive as Earth.
Which planet has the strongest gravity?
Among the planets in our solar system, Jupiter has the strongest surface gravity at 24.79 m/s², which is about 2.528 times Earth's gravity. A 150-pound person would weigh roughly 379 pounds on Jupiter. The Sun has by far the greatest gravity in the solar system at 274 m/s² (about 27.9× Earth's), but it is not a planet. Among the rocky planets, Venus has the highest gravity relative to its size at 0.907g, nearly matching Earth's.
What's the difference between weight and mass?
Mass is the amount of matter in an object, measured in kilograms (kg), and it never changes anywhere in the universe. Weight is the gravitational force acting on that mass, measured in newtons (N) or pounds-force. Your mass is the same on Earth and on the Moon, but you weigh about 6 times less on the Moon because lunar gravity is only 1/6 of Earth's. In everyday language, 'weight' often refers to mass — when you say you weigh 70 kg, you technically mean your mass is 70 kg.
Why is gravity different on each planet?
Surface gravity depends on a planet's mass and radius, following Newton's formula g = GM/r², where G is the gravitational constant, M is the planet's mass, and r is its radius. A more massive planet pulls harder (higher gravity), but a larger radius reduces it. Jupiter is 318× more massive than Earth but has 11× the radius, giving it 'only' 2.5× Earth's gravity. A small, dense body like the Moon has very low gravity (0.166g) because its mass is just 1.2% of Earth's.
How much would I weigh on the Moon?
The Moon's surface gravity is 1.62 m/s², about 16.6% of Earth's 9.81 m/s². Multiply your Earth weight by 0.166 to get your Moon weight. A 150-pound person weighs about 24.9 pounds on the Moon, and a 68 kg person weighs about 11.3 kg. This low gravity is why Apollo astronauts could leap several feet off the ground while wearing heavy spacesuits, and why they had to adopt a bounding gait rather than walking normally.
Could you stand on Jupiter?
Jupiter has no solid surface — it is a gas giant composed mostly of hydrogen and helium that transitions from gas to an increasingly dense fluid as you descend. There is no defined surface to stand on. If you descended into Jupiter's atmosphere, the gravity (24.79 m/s², about 2.5× Earth's) combined with crushing atmospheric pressure, extreme temperatures, and powerful storms would be immediately fatal. The 'surface' gravity used in this calculator refers to the point where atmospheric pressure equals 1 bar, the equivalent of Earth's sea-level pressure.
What would I weigh on the Sun?
The Sun's surface gravity is approximately 274 m/s², which is about 27.9 times Earth's gravity. A 150-pound person would weigh around 4,185 pounds on the Sun's surface — over 2 tons. Of course, no human could survive anywhere near the Sun: its surface temperature is about 5,500°C (9,932°F), and the radiation would instantly vaporize any material. The calculation is purely theoretical, illustrating how enormous the Sun's mass is compared to any planet.
How is surface gravity calculated?
Surface gravity is calculated using Newton's law of universal gravitation: g = GM/r², where G is the gravitational constant (6.674 × 10⁻¹¹ N·m²/kg²), M is the mass of the body in kilograms, and r is the radius in meters. For Earth, this gives g = (6.674×10⁻¹¹ × 5.972×10²⁴) / (6.371×10⁶)² ≈ 9.81 m/s². The values in this calculator use gravity ratios from NASA's Planetary Fact Sheet, which provides the most accurate measurements from spacecraft data.
How Gravity Affects Weight
Weight is a force — the product of your mass and the gravitational acceleration acting on you. Every planet, moon, and star has a different surface gravity depending on its mass and radius. A larger, denser body pulls harder, so you weigh more there. A smaller body pulls less, so you weigh less. The formula is simple:
Wplanet = Wearth × (gplanet / gearth)
W = weight | g = surface gravitational acceleration (m/s²)
Your mass never changes — only the gravitational force acting on it does. A 70 kg person has the same mass on Mars as on Earth, but they weigh about 264 N on Mars versus 687 N on Earth.
Planet Gravity Table
Gravity values sourced from the NASA Planetary Fact Sheet. The ratio column shows gravity relative to Earth (Earth = 1.0).
| Body | Surface Gravity (m/s²) | Gravity Ratio (Earth = 1) | 150 lbs becomes |
|---|---|---|---|
| Mercury | 3.70 | 0.378 | 56.7 lbs |
| Venus | 8.87 | 0.907 | 136.1 lbs |
| Earth | 9.81 | 1.000 | 150.0 lbs |
| Moon | 1.62 | 0.166 | 24.9 lbs |
| Mars | 3.72 | 0.377 | 56.6 lbs |
| Jupiter | 24.79 | 2.528 | 379.2 lbs |
| Saturn | 10.44 | 1.065 | 159.8 lbs |
| Uranus | 8.87 | 0.905 | 135.8 lbs |
| Neptune | 11.15 | 1.137 | 170.6 lbs |
| Pluto | 0.62 | 0.063 | 9.5 lbs |
| Sun | 274.0 | 27.9 | 4185 lbs |
Weight vs Mass — What's the Difference?
Mass
The amount of matter in an object. Measured in kilograms (kg). Mass is constant everywhere in the universe — a 70 kg person has 70 kg of mass whether they are on Earth, on the Moon, or floating in deep space. Mass does not depend on gravity.
Weight
The gravitational force acting on an object. Measured in newtons (N) or pounds-force (lbf). Weight changes depending on gravity — you weigh about 6× less on the Moon than on Earth, but your mass is exactly the same. The formula is W = m × g.
In everyday language, people say "weight" when they mean mass (e.g., "I weigh 70 kg"). Strictly, 70 kg is your mass; your weight on Earth is about 686 newtons (or 154 pounds-force). This calculator uses the colloquial definition — your "weight" in lbs or kg as shown on a scale.
Fun Facts About Gravity
- On the Moon, you weigh about 1/6 of your Earth weight. Astronauts can jump roughly 6× higher — that is why Apollo astronauts could hop so easily in their bulky suits.
- On Jupiter, you would weigh 2.5× more than on Earth. You would barely be able to stand up — walking would feel like carrying 1.5× your body weight as extra load.
- On Pluto, you weigh only 6.3% of your Earth weight. A 150-pound person would weigh under 10 pounds — you could jump tens of meters into the air.
- On the Sun (at the surface), you would weigh about 28× more than on Earth. The gravitational force would be instantly lethal — 150 lbs would become over 4,000 lbs of force.
- Venus and Uranus have nearly identical surface gravity (0.907g vs 0.905g), yet Venus is a rocky planet slightly smaller than Earth while Uranus is an ice giant 4× larger in diameter.
- Saturn is less dense than water— it would float in a large enough ocean. Yet its surface gravity (1.065g) is slightly higher than Earth's due to its enormous mass.
Why Pluto Is Included
Pluto was reclassified as a "dwarf planet" by the International Astronomical Union (IAU) in 2006, but it remains one of the most well-known objects in the solar system and is a popular comparison point for gravity demonstrations. Its extremely low surface gravity (0.063g) makes it a fascinating data point — showing just how weak gravity can be on smaller bodies. We include it alongside the Moon for the same reason: both are scientifically interesting, culturally significant, and commonly referenced in gravity discussions.
How Surface Gravity Is Calculated
Surface gravity is derived from Newton's law of universal gravitation:
g = GM / r²
g = surface gravity (m/s²) | G = gravitational constant (6.674 × 10⁻¹¹ N·m²/kg²) | M = planet mass (kg) | r = planet radius (m)
A planet with twice the mass but the same radius has twice the surface gravity. A planet with the same mass but twice the radius has one-quarter the surface gravity (because r² doubles twice). This is why Jupiter, despite being 318× more massive than Earth, has "only" 2.5× Earth's gravity — its radius is 11× larger, which partially cancels the mass advantage.
Related Tools
- Scientific Calculator — Perform advanced math calculations including powers, roots, and trigonometry.
- BMI Calculator — Calculate Body Mass Index from your height and weight on Earth.
- KG to LBS Converter — Convert between kilograms and pounds quickly.