News & Media

What would I weigh on the moon?

Have you ever wondered what you would weigh on the moon? It’s not such a silly question – and actually a surprisingly scientific one!

Weight is the force gravity exerts on an object due to it’s mass. Mass measures an object’s inertia- that is, it’s resistance to being moved or stopped, once in motion. Although your mass generally remains constant across the universe, your weight changes depending on the gravitational forces acting on you.

  • Gravity on the moon measures only a sixth of what it is on Earth.
  • Someone who weighs 150 pounds (68 kg) on this planet would only weigh 25 pounds (11 kg) on the moon.
  • The reason why gravity is so much lower is because the moon is just 1 per cent of the mass of Earth.
  • Your weight would vary greatly on different planets, depending on what their gravity was.
  • If you could stand on Jupiter (which you can’t!), you’d weigh more than twice as much as on Earth! Eek!

Each planet has different gravity, so therefore your weight is different on each planet! However, a planet’s size actually has a greater relative impact on it’s gravity and therefore your weight, than it’s mass. For example, Jupiter is 316 times the mass of Earth but you don’t weigh 316 times as much, because it is 11 x as large as Earth. Here’s an idea of what a 150 pound person would weigh on the other planets in our solar system:

  • Mercury 57 lbs
  • Venus 136 lbs
  • Mars 57 lbs
  • Jupiter 355 lbs
  • Saturn 137 lbs
  • Uranus 133 lbs
  • Neptune 169 lbs
  • Pluto 10 lbs

So, there you go! You might not be as light or as heavy as you think you are!