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Force in Newtons, Gravity & Customary Units

9.80665 N equals one kilogram-force or 1,000 grams-force under standard gravity. Select compatible units to convert or solve from an entered equivalent quantity.

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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.

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Formula and method

9.80665 N equals one kilogram-force or 1,000 grams-force under standard gravity.

1 kilogram-force = 9.80665 N; 1 pound-force = 0.45359237 × 9.80665 N

Worked example

Enter these known values and leave the other values blank.

Newtons
9.80665 N
Kilonewtons
0.009807 kN
Dynes
980665 dyn
Pounds-force
2.2046 lbf
Grams-force
1000 gf
Kilograms-force
1 kgf
Metric tonne-force
0.001 tf
Additional force units
9807 mN

Assumptions and limitations

  • Arithmetic uses 64 significant decimal digits. Displayed values are rounded separately.
  • Each field represents the same quantity in its selected units; enter one known value to calculate its equivalents.
  • Gravity-based force units use standard gravity of 9.80665 m/s². Pounds-force are force units; pounds of mass require an acceleration to obtain force.
  • The default tonne-force is metric: 1,000 kilogram-force. Signed values can represent a force component along a chosen axis.

Common questions

Is a kilogram-force the same as a kilogram?

A kilogram is mass. A kilogram-force is the force associated with one kilogram under standard gravity, equal to 9.80665 N.

References

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

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