Newton-Meters to Foot-Pounds
- Inch-pounds to foot-pounds
- Nm to foot-pounds
- Nm to inch-pounds
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How to convert newton-meters (Nm) to pound-feet
One Newton meter/metre (Nm) = 0.7376 lbf.ft (frequently expressed as ft-lb or foot pounds, but technically lbf.ft is correct) representing 1 lbf acting at 1 ft from the centre of rotation. To convert your Nm figure to lbf.ft, simply multiply it by 0.7376.
Note: We express pound force as lbf in the definition above in order to distinguish it from lb mass, but it can also be written as lb-ft. The use of ft/lb for torque is incorrect, although frequently seen and quoted in magazines.
Pound-feet and foot-pounds
There has been much debate around whether it is correct to use foot-pounds when referring to torque, with the term "pound-foot" being proposed to reduce confusion with foot-pound, a unit of work. This terminology was suggested by British physicist Arthur Mason Worthington in his 1900 book 'Dynamics of Rotation' while he was a professor of physics at the Royal Naval Engineering College in Devonport.
In an article on EngineLabs, Greg Acosta explains why pound-feet (or pound-force foot) is the correct term to use, referencing the industry standard adopted by the Society of Automotive Engineers:Newton-meters and pound-feet are both units of torque in the International System of Units. Torque is a measure of the rotational force that causes an object to turn about an axis. 3
If your calculation involves inch-pounds and foot pounds for energy, you can convert between inch-pounds and foot-pounds here.
The chart below features some of the most common torque conversions for newton-meters (Nm) and pound-feet.
Newton-meters to pound-feet chart
| Newton-meters | Pound-feet |
|---|---|
| 1 Nm | 0.738 lb-ft |
| 2 Nm | 1.475 lb-ft |
| 3 Nm | 2.213 lb-ft |
| 4 Nm | 2.950 lb-ft |
| 5 Nm | 3.688 lb-ft |
| 6 Nm | 4.425 lb-ft |
| 7 Nm | 5.163 lb-ft |
| 8 Nm | 5.900 lb-ft |
| 9 Nm | 6.638 lb-ft |
| 10 Nm | 7.376 lb-ft |
| Newton-meters | Pound-feet |
|---|---|
| 10 Nm | 7.376 lb-ft |
| 20 Nm | 14.751 lb-ft |
| 30 Nm | 22.127 lb-ft |
| 40 Nm | 29.502 lb-ft |
| 50 Nm | 36.878 lb-ft |
| 60 Nm | 44.254 lb-ft |
| 70 Nm | 51.629 lb-ft |
| 80 Nm | 59.005 lb-ft |
| 90 Nm | 66.381 lb-ft |
| 100 Nm | 73.756 lb-ft |
| 200 Nm | 147.512 lb-ft |
| 300 Nm | 221.269 lb-ft |
| 400 Nm | 295.025 lb-ft |
| 500 Nm | 368.781 lb-ft |
| 600 Nm | 442.537 lb-ft |
| 700 Nm | 516.294 lb-ft |
| 800 Nm | 590.050 lb-ft |
| 900 Nm | 663.806 lb-ft |
| 1000 Nm | 737.562 lb-ft |
| Note: conversions are rounded to max 3 decimal places. | |
How to convert pound-feet to newton-meters (Nm)
One pound-foot (lb-ft) is equal to 1.356 newton-meters (Nm). To convert pound-feet to newton-meters, multiply your figure by 1.356.
Again, note that we express pound force as lbf to distinguish it from lb mass.
Pound-feet to newton-meters chart
| Pound-feet | Newton-meters |
|---|---|
| 1 lb-ft | 1.356 Nm |
| 2 lb-ft | 2.712 Nm |
| 3 lb-ft | 4.067 Nm |
| 4 lb-ft | 5.423 Nm |
| 5 lb-ft | 6.779 Nm |
| 6 lb-ft | 8.135 Nm |
| 7 lb-ft | 9.491 Nm |
| 8 lb-ft | 10.847 Nm |
| 9 lb-ft | 12.202 Nm |
| 10 lb-ft | 13.558 Nm |
| 20 lb-ft | 27.116 Nm |
| 30 lb-ft | 40.675 Nm |
| 40 lb-ft | 54.233 Nm |
| 50 lb-ft | 67.791 Nm |
| 60 lb-ft | 81.349 Nm |
| 70 lb-ft | 94.907 Nm |
| 80 lb-ft | 108.465 Nm |
| 90 lb-ft | 122.024 Nm |
| 100 lb-ft | 135.582 Nm |
| 150 lb-ft | 203.373 Nm |
| 200 lb-ft | 271.164 Nm |
| 250 lb-ft | 338.954 Nm |
| 300 lb-ft | 406.745 Nm |
| Note: conversions are rounded to max 3 decimal places. | |
For any figures not represented in our Nm and lb-ft chart, please use the converter at the top of the page.
Calculator by Alastair Hazell.References
- A.M Worthington. Dynamics of Rotation.
- EngineLabs. Pound-feet or foot-pounds–which one is it?.
- Khan Academy. What is torque?.