其他星球体重计算器 — 您在火星、月球等天体上的体重
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
在其他星球上的体重是如何计算的？
体重 = 质量 × 重力加速度（g）。不同星球的 g 值不同，因此相同质量的物体在不同星球上体重不同。例如，月球 g = 1.62 m/s²（地球的 16.5%）；火星 g = 3.72 m/s²（地球的 38%）；木星 g = 24.79 m/s²（地球的 253%）。
为什么在月球上体重只有地球的 1/6？
月球表面重力加速度约为 1.62 m/s²，是地球（9.81 m/s²）的约 16.5%（即约 1/6）。这是因为月球质量仅为地球的 1.2%，体积更小，因此表面引力更弱。在月球上，60 kg 的人体重约等于 10 kg 的地球重量。
质量和重力有什么区别？
质量（Mass）是物体所含物质的量，以千克（kg）为单位，在任何地方都相同；重量（Weight）是重力对物体的作用力，等于质量乘以当地重力加速度（F=mg），因地点不同而变化。宇航员在太空中失重，但质量不变。
太阳上的重力有多强？
太阳表面重力加速度约为 274 m/s²，是地球的约 28 倍。一个在地球上重 70 kg 的人，在太阳上（假设能站在表面）体重约为 1,918 kg。木星虽然不是太阳，但其表面重力也约是地球的 2.5 倍。
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.
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