Weight Calculator

Your details

Choose the unknown you want to calculate. Enter the other two values.
Unit for the mass input.
The amount of matter in the object. Mass does not change with location.
kg
Surface gravitational acceleration for the chosen body.
Choose the unit for the primary weight output.
ResultEarth-like gravity
686.4655
Weight (N)686.465N
Weight (kgf)70kgf
Weight (lbf)154.3236lbf
Weight (kN)0.686466kN
Gravity used9.80665m/s²
Mass (kg)70kg
Mass (lb)154.3236lb
Weight (N)686.465
kgf70
lbf154.3236

70 kg weighs 686.47 N here.

  • Mass of 70 kg times 9.807 m/s² gives a gravitational force of 686.47 N (154.32 lbf).
  • Mass is invariant: it does not change with location, only weight (force) does.
  • To convert to kilograms-force divide by 9.80665: 70 kgf. To convert to pound-force divide by 4.44822: 154.324 lbf.

Next stepTry changing the planet dropdown to compare how the same mass feels on the Moon, Mars, or Jupiter.

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