Newton metres to pound-feet – and pound-feet to newton metres
1 Nm = 0.73756215 lb-ft
All units in this category
- 100Nm
- 10.197162kgf·m
- 73.756215lb-ft
- 885.07458lb-in
- 14,161.193oz-in
Formula
Multiply the value in newton metres by 0.73756215 to get pound-feet.lb-ft = Nm × 0.73756215
Multiply the value in pound-feet by 1.3558179 to get newton metres.Nm = lb-ft × 1.3558179
How to convert newton metres to pound-feet
Type a value in the field above and the result is calculated instantly. Use the arrow button to swap direction, or pick other units from the lists.
Doing it in your head
A rough conversion for when the calculator is not to hand. The error comes last, and it holds in both directions at that order of magnitude.
- Newton metres to pound-feet: × 2 ÷ 3 + 10%. That gives 0.7333 instead of 0.737562, an error of 0.57%.
- Pound-feet to newton metres: × 3 ÷ 2 − 10%. That gives 1.35 instead of 1.35582, an error of 0.43%.
Newton metres to pound-feet – common values
| Newton metres (Nm) | Pound-feet (lb-ft) |
|---|---|
| 5 | 3.68781 |
| 10 | 7.37562 |
| 20 | 14.7512 |
| 30 | 22.1269 |
| 50 | 36.8781 |
| 80 | 59.005 |
| 100 | 73.7562 |
| 150 | 110.634 |
| 200 | 147.512 |
| 300 | 221.269 |
Pound-feet to newton metres – common values
| Pound-feet (lb-ft) | Newton metres (Nm) |
|---|---|
| 5 | 6.77909 |
| 10 | 13.5582 |
| 20 | 27.1164 |
| 30 | 40.6745 |
| 50 | 67.7909 |
| 80 | 108.465 |
| 100 | 135.582 |
| 150 | 203.373 |
| 200 | 271.164 |
| 300 | 406.745 |
About the units
Newton metres. The newton metre is the SI coherent unit of moment of force: one newton on a lever arm of one metre. As a combination of two legal units it is legal throughout the EU, and EU type-approval papers require an engine’s maximum net torque in newton metres at a speed in min⁻¹. The trap is the joule. Newton metre and joule share a dimension, kilogram times square metre per second squared, but they are different quantities. Write Nm for torque and J for energy.
Pound-feet. A pound-foot is the moment of a pound-force on a lever arm of one foot, exactly 1.3558179483314 newton metres. Since both the pound and the foot are exact figures, so is this one. The unit belongs to American automotive and workshop engineering: engine specifications and torque wrenches. A wrench marked 100 lb-ft is 135.6 newton metres. The trap is the word order. “lb-ft” is torque and “ft-lb” energy – the same number, different quantities, and English writes them almost alike.