How to Use the Planet Weight Calculator
Weight isn't mass — it's the force of gravity pulling on you. Your mass, the actual amount of matter you're made of, stays exactly the same no matter where in the universe you go, but surface gravity varies from planet to planet depending on size and density, so the number a scale reads changes with it. This calculator takes your weight as measured on Earth and multiplies it by each body's gravity ratio (its surface gravity relative to Earth's, where Earth equals 1) to instantly show what you'd weigh on everything from Mercury to Pluto, plus the Moon.
Jupiter has the strongest surface gravity in the solar system, about 2.36 times Earth's. A person who weighs 150 lbs on Earth would be crushed under roughly 354 lbs of felt weight on Jupiter. At the other extreme, Pluto's gravity is only about 0.062 times Earth's, so that same 150-lb person would weigh a mere 9.3 lbs there — light as a feather. The Moon sits at roughly one-sixth of Earth's gravity (0.166), which is exactly why footage of astronauts bounding across the lunar surface looks so different from walking on Earth.
Whenever Mars colonization or space tourism makes headlines, it's natural to wonder what you'd actually weigh out there — now you can find out directly, and use the numbers as a handy reference for science lessons or space-themed content.
Frequently Asked Questions
Weight is the force of gravity pulling on you, not mass. Your mass, the amount of matter you're made of, stays the same everywhere in the universe, but surface gravity differs by planet based on size and density, so the number on a scale changes.
Jupiter is the largest and most massive planet in the solar system, giving it surface gravity about 2.36 times Earth's. A person who weighs 150 lbs on Earth would weigh about 354 lbs on Jupiter.