What Would You Weigh on Other Planets?
If you stepped onto another planet, your mass would stay the same but your weight would change. That is because weight depends on gravity. A world with weaker surface gravity would make you feel lighter, while a planet with stronger gravity would make you feel heavier. This guide uses Earth as the reference and shows how the same person would be affected across the Solar System.
Why Weight Changes from Planet to Planet
Mass is the amount of matter in your body. Weight is the force of gravity pulling on that mass. On Earth we often treat the two words casually, but in planetary science they are not the same thing. If you travel to Mars, you still have the same mass, yet the lower Martian gravity would make a scale read less.
Surface gravity depends on both total mass and size. A planet can contain much more material than Earth but spread it across a huge radius, which changes how strong gravity feels near the cloud tops or surface. That is why Neptune can pull harder than Earth even though it is far away and much colder.
Weight on Each Planet
The table below uses two familiar Earth examples: a person whose mass is 70 kilograms, and someone who weighs 154 pounds on Earth. The listed planet values are approximate scale readings under local gravity.
| Planet | Gravity vs Earth | 70 kg Person Would Read | 154 lb Person Would Read |
|---|---|---|---|
| Mercury | 0.38 g | 27 kg | 58 lb |
| Venus | 0.90 g | 63 kg | 139 lb |
| Earth | 1.00 g | 70 kg | 154 lb |
| Mars | 0.38 g | 27 kg | 58 lb |
| Jupiter | 2.53 g | 177 kg | 389 lb |
| Saturn | 1.07 g | 75 kg | 165 lb |
| Uranus | 0.89 g | 62 kg | 137 lb |
| Neptune | 1.14 g | 80 kg | 176 lb |
Jupiter's value is the most dramatic, but it comes with an important note: Jupiter does not offer a normal solid standing surface. These numbers are still useful as gravity comparisons, even when the environment itself is not walkable.
Which Planets Feel Heaviest?
Jupiter has the strongest gravity of the major planets at the reference level usually used in tables. Neptune also pulls a bit harder than Earth, and Saturn is slightly stronger than Earth despite its lower average density. That last detail surprises many learners, but a large planet can still create a strong pull if you measure close enough to its main atmospheric layers.
Heavier-feeling gravity affects movement, jumping, lifting, and long-term human health. It would also place more demands on vehicles, aircraft, and landing systems. So when scientists compare worlds for human missions, gravity is one of the first practical filters.
Which Places Feel Lightest?
Mercury and Mars both come in at about 38 percent of Earth's gravity, which means you would feel much lighter there. That makes Mars especially interesting because it offers low gravity without the crushing heat of Venus or the lack of any real surface on the gas giants.
The Moon is lighter still at about 16 percent of Earth's gravity, but it is not a planet. Even so, it is useful as a comparison because we have seen astronauts move in that environment. Their bouncing motion gives a real-world picture of how reduced gravity changes human movement.
Why Gravity Is Different
Gravity depends on mass, radius, and density. A compact rocky planet with a dense metal core can produce stronger gravity than its size alone might suggest. A large planet can also have surprisingly Earth-like gravity if the measurement point is far from its center. That is why Saturn, though enormous, does not make you feel massively heavier than on Earth.
For more context, compare the Mars profile, the Jupiter guide, and the planet sizes comparison. Size and gravity are related, but they do not scale in a simple one-to-one way.
FAQ
Would I weigh less on Mars?
Yes. Mars has about 38 percent of Earth's surface gravity, so a scale would show a much lower reading.
Why would I weigh more on Jupiter?
Because Jupiter's gravity is much stronger than Earth's at the standard reference level used for comparison.
Is your mass different on another planet?
No. Your mass stays the same. Only your weight changes because the local gravity changes.
Why is Saturn's gravity not wildly larger than Earth's?
Saturn is massive, but it is also very large in radius, so the gravity at its outer layers is only slightly stronger than Earth's.