Free · Force calculators 💪

Kilogram-Force, Newtons & Force Units

Convert kilogram-force, newtons and other force units using standard gravity and exact unit definitions.

  • Formula & worked example
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

One kilogram-force is exactly 9.80665 newtons. It is a force unit, while one kilogram by itself is a mass.

Force in newtons = force in kilogram-force × 9.80665

Worked example

Enter these known values and leave the other values blank.

Kilogram-force
1 kgf
Force in newtons
9.80665 N
Force in another unit
2.204623 lbf

Assumptions and limitations

  • Kilogram-force is defined using standard gravity, exactly 9.80665 m/s². It does not mean the weight of a kilogram at every location.
  • These are linear force conversions. Signed and zero values are supported; a sign describes a chosen direction. One kip is exactly 1,000 pound-force.
  • To calculate gravitational weight from mass, multiply mass by the applicable gravitational acceleration instead of treating kilograms as kilogram-force.

Common questions

Can kilograms be converted to newtons without gravity?

Mass and force are different dimensions. This tool converts kilogram-force to newtons, which uses standard gravity by definition.

What is the difference between kgf and kp?

Kilogram-force and kilopond are names for the same force unit: exactly 9.80665 N.

References

The pound-force uses the exact international pound and standard gravity instead of the rounded captured factor. One kip is exactly one thousand pound-force, using the international pound and standard gravity.

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