Convert Pounds-force to Newtons
1 pound-force is 4.448222 N. One pound-force is exactly 4.44822161526 newtons.
One pound-force is 4.4482216 newtons. To convert pounds-force to newtons, multiply by 4.4482216; to go the other way, divide by 4.4482216 or multiply by 0.22480894. 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 × 4.4482216
value * 4.448221615264.448 N
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 newtons?
- 1.Take the measurement in pounds-force.
- 2.Multiply by 4.4482216 — that is how many newtons fit in one pound-force.
- 3.To go back the other way, divide by 4.4482216, or multiply by 0.22480894.
Worked example: 25 pounds-force to newtons
- Formula
- lbf × 4.4482216 = N
- Arithmetic
- 25 × 4.4482216 = 111.20554 N
- Answer
- 25 lbf = 111.20554 N
The factor is rounded for display; the figure above is computed from the full value.
Pounds-force to newtons conversion table
| Pounds-force | Newtons |
|---|---|
| 1 lbf | 4.448222 N |
| 2 lbf | 8.896443 N |
| 3 lbf | 13.344665 N |
| 4 lbf | 17.792886 N |
| 5 lbf | 22.241108 N |
| 6 lbf | 26.68933 N |
| 7 lbf | 31.137551 N |
| 8 lbf | 35.585773 N |
| 9 lbf | 40.033995 N |
| 10 lbf | 44.482216 N |
| 12 lbf | 53.378659 N |
| 15 lbf | 66.723324 N |
| 20 lbf | 88.964432 N |
| 25 lbf | 111.20554 N |
| 50 lbf | 222.411081 N |
| 100 lbf | 444.822162 N |
| 200 lbf | 889.644323 N |
| 300 lbf | 1,334.466485 N |
| 500 lbf | 2,224.110808 N |
| 1000 lbf | 4,448.221615 N |
| 2000 lbf | 8,896.443231 N |
| 5000 lbf | 22,241.108076 N |
| 10000 lbf | 44,482.216153 N |
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 newton?
The SI unit: the force that accelerates one kilogram by one metre per second every second. Holding a small apple against gravity takes about one newton.
How many newtons are in a pound-force?
One pound-force is 4.4482216 newtons. Going the other way, one newton is 0.22480894 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 newtons are in a pound-force?
- 4.4482216. The SI unit: the force that accelerates one kilogram by one metre per second every second. Holding a small apple against gravity takes about one newton.
- How do I convert newtons back to pounds-force?
- Divide by 4.4482216, or multiply by 0.22480894 — they are the same operation.
Other force conversions
Newtons to pounds-force — the same conversion the other way.