How much would I weigh on Neptune?
80if you weigh 70 on Earth
On Neptune you would weigh 1.14× what you weigh on Earth — 1.14× more. 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 Neptune in 3D
On Neptune: 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. Neptune gives the closest thing to a "heavier Earth" feel of any planet — about 14% more than your weight here.
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 Neptune 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 Found something out of date?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.