How much would I weigh on Mars?
26if you weigh 70 on Earth
On Mars you would weigh 0.38× what you weigh on Earth — 62% less. Your mass never changes; only the pull of gravity does. Type your own weight below (any unit) to see it change across every world.
▶ Visit Mars in 3D
On Mars: 0 (the same unit)
Why your weight changes but you don't
Weight is just gravity's pull on your mass. Step onto another world and your body is unchanged — the same atoms, the same mass — but the ground beneath pulls harder or softer, so a scale reads a different number. On Mars you weigh just over a third of your Earth weight, which is why a future astronaut could bound several metres in a single stride.
An astronaut who "weighs nothing" in orbit hasn't lost any mass at all — they are simply falling around the Earth so fast that they never hit it. Weight is about pull; mass is about stuff.
Your weight across the solar system
One number in, everywhere out — these all update live from the box above:
Feel the worlds behind the numbers: open the interactive view and stand over Mars in real scale.
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✓ Facts verified July 2026
Every figure on this page is a real, rounded value checked against primary sources. Found something out of date? See how we keep it accurate.