How it's calculated
F = m × g
F = weight (force) in newtons, m = mass in kilograms, g = gravitational acceleration (default 9.80665 m/s²). Rearrange to m = F ÷ g. Also kgf = F ÷ 9.80665, lbf = F ÷ 4.44822.
Common values
| Mass | Body | Weight (N) |
|---|---|---|
| 1 kg | Earth | 9.807 N |
| 1 kg | Moon | 1.62 N |
| 1 kg | Mars | 3.71 N |
| 10 kg | Earth | 98.07 N |
Common questions
How many newtons is one kilogram on Earth?
A 1 kg mass weighs about 9.81 newtons under Earth's standard gravity.
Why does weight change but mass stays the same?
Mass is the amount of matter and never changes, while weight is the pull of gravity on that mass, so it drops on the Moon and rises on Jupiter.