Weight Calculator (W = mg)
Weight Calculator (W = mg)
In physics, weight is the force of gravity pulling on an object's mass, measured in newtons - distinct from mass itself, which stays the same everywhere. Enter a mass and a gravity value (Earth's standard 9.81 m/s² by default), and this calculator finds the weight, or works backward from a known weight to find the mass.
- W = m × g, so a 70 kg person weighs 70 × 9.81 = 686.7 N on Earth.
- Mass never changes, but weight does - the same 70 kg person would weigh only about 113.4 N on the Moon (g = 1.62 m/s²), since the Moon's gravity is much weaker.
- Common gravity values: Earth 9.81 m/s², Moon 1.62 m/s², Mars 3.71 m/s², Jupiter 24.79 m/s² - enter any of these to find weight elsewhere in the solar system.
How do I calculate weight in physics?
Multiply the mass by the local gravitational acceleration: W = m × g.
How much would a 70 kg person weigh on the Moon?
W = 70 × 1.62 = 113.4 N, compared to 686.7 N on Earth - about one-sixth as much.
Weight Calculator (W = mg)
In physics, weight is the force of gravity pulling on an object's mass, measured in newtons - distinct from mass itself, which stays the same everywhere. Enter a mass and a gravity value (Earth's standard 9.81 m/s² by default), and this calculator finds the weight, or works backward from a known weight to find the mass.
- W = m × g, so a 70 kg person weighs 70 × 9.81 = 686.7 N on Earth.
- Mass never changes, but weight does - the same 70 kg person would weigh only about 113.4 N on the Moon (g = 1.62 m/s²), since the Moon's gravity is much weaker.
- Common gravity values: Earth 9.81 m/s², Moon 1.62 m/s², Mars 3.71 m/s², Jupiter 24.79 m/s² - enter any of these to find weight elsewhere in the solar system.
How do I calculate weight in physics?
Multiply the mass by the local gravitational acceleration: W = m × g.
How much would a 70 kg person weigh on the Moon?
W = 70 × 1.62 = 113.4 N, compared to 686.7 N on Earth - about one-sixth as much.