How to convert newtons to pounds-force
- Take the value in newtons.
- Use the formula pounds-force = newtons × 0.2248089431.
- For example, 1 N is 0.225 lbf.
About newtons and pounds-force
A pound-force is the weight of a one-pound mass under standard gravity, 4.44822 newtons. Multiply newtons by 0.224809 to get pounds-force, or divide by 4.448. Dividing by 4.5 gives a quick answer about 1% low.
Physics and engineering work in newtons, while US specs for thrust, spring rates and load ratings often use pounds. Climbing gear, ropes and anchors are rated in kilonewtons, so converting to pounds helps put those ratings in familiar terms.
Examples
- 1 N (about the weight of a small apple) is 0.225 lbf
- 9.81 N (the weight of 1 kg on Earth) is 2.2 lbf
- 686.47 N (the weight of a 70 kg person) is 154.32 lbf
- 22,000 N (a carabiner rated at 22 kN) is 4,945.8 lbf
Newtons to pounds-force chart
| Newtons (N) | Pounds-force (lbf) |
|---|---|
| 1 | 0.225 |
| 2 | 0.45 |
| 5 | 1.12 |
| 9.81 | 2.21 |
| 10 | 2.25 |
| 20 | 4.5 |
| 50 | 11.24 |
| 100 | 22.48 |
| 200 | 44.96 |
| 500 | 112.4 |
| Newtons (N) | Pounds-force (lbf) |
|---|---|
| 1,000 | 224.81 |
| 2,000 | 449.62 |
| 5,000 | 1,124.04 |
| 10,000 | 2,248.09 |
| 20,000 | 4,496.18 |
| 22,000 | 4,945.8 |
| 25,000 | 5,620.22 |
| 50,000 | 11,240.45 |
| 100,000 | 22,480.89 |