Weight force calculator (W = m × g)
Mass stays the same from one planet to another, weight does not. Type the mass and the place: you get the weight force in newtons.
Result
686.47 NWeight force
- In kilonewtons
- 0.6865 kN
- In kilograms-force
- 70 kgf
- In pounds-force
- 154.324 lbf
- Gravity used
- 9.80665 m/s²
Inputs
- Mass
- 70
- Mass unit
- kilograms (kg)
- Where?
- Earth
How it is calculated
Weight W = m × g, with m in kilograms and g in m/s².
Result
Weight force
- In kilonewtons
- 0.6865 kN
- In kilograms-force
- 70 kgf
- In pounds-force
- 154.324 lbf
How it is calculated
- Weight W = m × g, with m in kilograms and g in m/s².
- g on Earth = 9.80665 m/s² (standard value); Moon ≈ 1.62; Mars ≈ 3.71.
- 1 kgf = 9.80665 N; 1 lbf ≈ 4.44822 N.
Example
70 kg on Earth: 70 × 9.80665 ≈ 686.47 N (70 kgf). On the Moon: 113.4 N.
Good to know
- Mass (kg) and weight (N) are different things: a bathroom scale shows a mass.
- On Earth, g varies slightly with the place (about 9.78 to 9.83 m/s²).
Sources
- 3rd CGPM (1901), standard gravity g = 9.80665 m/s²
- NASA planetary fact sheets (Moon and Mars gravity)
Frequently asked questions
What is this tool used for?
Mass stays the same from one planet to another, weight does not. Type the mass and the place: you get the weight force in newtons.
How is the result calculated?
Weight W = m × g, with m in kilograms and g in m/s².
What should I check before using the result?
Mass (kg) and weight (N) are different things: a bathroom scale shows a mass.