How much would you weigh on other planets?
Your mass never changes — but your weight is just gravity’s pull on that mass, and every world pulls differently. Type your weight below and watch it swing from featherweight on the Moon to crushing on Jupiter, all computed from NASA surface-gravity data.
Tiny and dense — you’d weigh about a third of your Earth weight.
Almost Earth’s twin in size, so your weight barely changes.
Home base — the weight you already know, and our 1.0× reference point.
Just 1/6 of Earth’s pull — this is why the Apollo astronauts bounced.
Roughly a third of Earth — you could jump nearly three times higher.
The heavyweight champion: ~2.5× your weight at its cloud tops (it has no solid ground).
Despite being 95× Earth’s mass, it’s so puffy your weight is almost unchanged.
Bigger than Earth, yet you’d weigh slightly less — size isn’t everything.
One of only two worlds here where you’d weigh MORE than on Earth.
Why your weight changes but you don’t
Step on a scale and it reads your weight — the force with which Earth’s gravity pulls you down. Fly to Mars and the scale reads about a third of that, because Mars pulls far more gently. But you haven’t shrunk: your mass, the actual amount of matter in your body, is identical on Mars, the Moon, or Jupiter. Weight is mass × gravity, so only the gravity part travels.
That’s why you’d weigh most on Jupiter (~2.5× Earth) and least on the Moon (~1/6). It’s also behind two great space-trivia curveballs: Saturn is 95 times Earth’s mass yet its gravity is almost identical to ours, because it’s so enormous and low-density that its cloud tops sit far from its centre — and Uranus, though bigger than Earth, would leave you slightly lighter. Bigger planet doesn’t always mean heavier you.
Cosmic fun facts
Neptune rains diamonds
Crushing pressure deep in Neptune (and Uranus) squeezes carbon into literal diamond hail. You’d weigh a touch more than on Earth — and it’s raining gems.
Jupiter is the heavyweight
At ~2.5× Earth gravity, a 30 kg kid would tip the scales like a full-grown adult. Standing up would feel like wearing a second person.
The Moon turns you into a kangaroo
At 1/6 gravity, every step is a moon-bounce. Apollo astronauts gave up walking and hopped — it was simply easier.
Mercury: sprinter’s paradise
About a third of Earth’s pull means longer strides and higher jumps — though the 430°C days make it a poor choice for a marathon.
Saturn would let you float — almost
Despite being 95× Earth’s mass, Saturn’s gravity is basically Earth’s (0.92×): it’s so puffy it would float in a big enough bathtub.
Mars: the high-jump record awaits
At 38% gravity you could clear roughly 3× your Earth high-jump — one reason Mars is the friendliest world for future explorers.
🏋️ Which planet matches your fitness era?
Feeling springy? You’re in your Moon era — 11.6 kg, basically bouncing. Ready to train heavy? Welcome to your Jupiter era — 177 kg, where even standing is a workout. Most of us live happiest somewhere around Mars (26.5 kg) — light on your feet, still grounded.
Loved this? See your age on every planet
You’re a different number of years old on Mercury, Mars and Jupiter too — find out in seconds.
Try the Planetary Age calculatorWeight on other planets — FAQ
Gravity values from NASA’s NSSDCA Planetary Fact Sheet (ratio to Earth). Jupiter is “cloud-top” gravity, since it has no solid surface. This is a fun science tool — nothing you enter is stored or sent anywhere.
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