Convert Pounds-force to Kilograms-force
1 pound-force is 0.453592 kgf. One pound-force is exactly 0.45359237 kilograms-force.
One pound-force is 0.45359237 kilograms-force. To convert pounds-force to kilograms-force, multiply by 0.45359237; to go the other way, divide by 0.45359237 or multiply by 2.2046226. The factor is exact rather than rounded: it follows from NIST Special Publication 811. The weight of one pound under standard gravity, exactly 4.4482216152605 newtons.
Factor checked against the defining standard · How we check
- Pounds-force × 0.45359237
value * 0.453592370.454 kgf
1 pound-force in every force unit
| Unit | Value | Exact factor |
|---|---|---|
| newtons | 4.448221615 N | × 4.44822161526 |
| kilonewtons | 0.004448221615 kN | × 0.00444822161526 |
| pounds-force (as entered) | 1 lbf | — |
| kilograms-force | 0.45359237 kgf | × 0.45359237 |
| ounces-force | 16 ozf | × 16 |
| dynes | 444,822.1615 dyn | × 444,822.161526 |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert pounds-force to kilograms-force?
- 1.Take the measurement in pounds-force.
- 2.Multiply by 0.45359237 — that is how many kilograms-force fit in one pound-force.
- 3.To go back the other way, divide by 0.45359237, or multiply by 2.2046226.
Worked example: 25 pounds-force to kilograms-force
- Formula
- lbf × 0.45359237 = kgf
- Arithmetic
- 25 × 0.45359237 = 11.339809 kgf
- Answer
- 25 lbf = 11.339809 kgf
The factor is exact, so this figure is exact too — only the display is rounded.
Pounds-force to kilograms-force conversion table
| Pounds-force | Kilograms-force |
|---|---|
| 1 lbf | 0.453592 kgf |
| 2 lbf | 0.907185 kgf |
| 3 lbf | 1.360777 kgf |
| 4 lbf | 1.814369 kgf |
| 5 lbf | 2.267962 kgf |
| 6 lbf | 2.721554 kgf |
| 7 lbf | 3.175147 kgf |
| 8 lbf | 3.628739 kgf |
| 9 lbf | 4.082331 kgf |
| 10 lbf | 4.535924 kgf |
| 12 lbf | 5.443108 kgf |
| 15 lbf | 6.803886 kgf |
| 20 lbf | 9.071847 kgf |
| 25 lbf | 11.339809 kgf |
| 50 lbf | 22.679619 kgf |
| 100 lbf | 45.359237 kgf |
| 200 lbf | 90.718474 kgf |
| 300 lbf | 136.077711 kgf |
| 500 lbf | 226.796185 kgf |
| 1000 lbf | 453.59237 kgf |
| 2000 lbf | 907.18474 kgf |
| 5000 lbf | 2,267.96185 kgf |
| 10000 lbf | 4,535.9237 kgf |
What is a pound-force?
The weight of one pound under standard gravity, exactly 4.4482216152605 newtons. A pound of mass and a pound-force are different quantities that share a name, which is why this unit exists at all.
What is a kilogram-force?
The weight of one kilogram under standard gravity, exactly 9.80665 newtons by the defined value of that gravity. Older European engineering drawings are full of it.
How many kilograms-force are in a pound-force?
One pound-force is 0.45359237 kilograms-force, exactly. Going the other way, one kilogram-force is 2.2046226 pounds-force. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every force unit here
| Unit | Symbol | One of these is |
|---|---|---|
| Newtons | N | the base unit |
| Kilonewtons | kN | 1000 newton |
| Pounds-force | lbf | 4.4482216 newton |
| Kilograms-force | kgf | 9.80665 newton |
| Ounces-force | ozf | 0.27801385 newton |
| Dynes | dyn | 1.0000 × 10^-5 newton |
Source: NIST Special Publication 811 — pound-force is exactly 4.4482216152605 N
Questions people actually ask
- How many kilograms-force are in a pound-force?
- 0.45359237. The weight of one kilogram under standard gravity, exactly 9.80665 newtons by the defined value of that gravity. Older European engineering drawings are full of it.
- How do I convert kilograms-force back to pounds-force?
- Divide by 0.45359237, or multiply by 2.2046226 — they are the same operation.
Other force conversions
Kilograms-force to pounds-force — the same conversion the other way.