Nm to ft-lbs Converter
Created by: Olivia Harper
Last updated:
To convert newton-meters to foot-pounds, multiply by 0.7376: 100 Nm is 73.8 ft-lb and 340 Nm is 250.8 ft-lb. To convert foot-pounds to newton-meters, multiply by 1.3558, so 80 ft-lb is 108.5 Nm. The converter works in both directions and also gives inch-pounds.
Nm to ft-lbs Converter
Conversion1 N·m = 0.7376 ft-lb. Switch direction to convert foot-pounds to newton-meters.
Nm to ft-lbs conversion chart
ft-lb = Nm × 0.737562. Nm = ft-lb × 1.355818.
| Newton-meters (N·m) | Foot-pounds (ft-lb) |
|---|---|
| 1 N·m | 0.7376 ft-lb |
| 5 N·m | 3.6878 ft-lb |
| 8 N·m | 5.9005 ft-lb |
| 10 N·m | 7.3756 ft-lb |
| 15 N·m | 11.0634 ft-lb |
| 20 N·m | 14.7512 ft-lb |
| 25 N·m | 18.4391 ft-lb |
| 30 N·m | 22.1269 ft-lb |
| 40 N·m | 29.5025 ft-lb |
| 50 N·m | 36.8781 ft-lb |
| 60 N·m | 44.2537 ft-lb |
| 80 N·m | 59.005 ft-lb |
| 100 N·m | 73.7562 ft-lb |
| 105 N·m | 77.444 ft-lb |
| 110 N·m | 81.1318 ft-lb |
| 120 N·m | 88.5075 ft-lb |
| 140 N·m | 103.2587 ft-lb |
| 150 N·m | 110.6343 ft-lb |
| 200 N·m | 147.5124 ft-lb |
| 250 N·m | 184.3905 ft-lb |
| 300 N·m | 221.2686 ft-lb |
| 340 N·m | 250.7711 ft-lb |
| 400 N·m | 295.0249 ft-lb |
| 500 N·m | 368.7811 ft-lb |
| 520 N·m | 383.5323 ft-lb |
| 680 N·m | 501.5423 ft-lb |
| 900 N·m | 663.8059 ft-lb |
| 1,000 N·m | 737.5621 ft-lb |
| Foot-pounds (ft-lb) | Newton-meters (N·m) |
|---|---|
| 5 ft-lb | 6.7791 N·m |
| 10 ft-lb | 13.5582 N·m |
| 15 ft-lb | 20.3373 N·m |
| 20 ft-lb | 27.1164 N·m |
| 25 ft-lb | 33.8954 N·m |
| 30 ft-lb | 40.6745 N·m |
| 40 ft-lb | 54.2327 N·m |
| 50 ft-lb | 67.7909 N·m |
| 60 ft-lb | 81.3491 N·m |
| 75 ft-lb | 101.6863 N·m |
| 80 ft-lb | 108.4654 N·m |
| 90 ft-lb | 122.0236 N·m |
| 100 ft-lb | 135.5818 N·m |
| 120 ft-lb | 162.6982 N·m |
| 150 ft-lb | 203.3727 N·m |
| 200 ft-lb | 271.1636 N·m |
| 250 ft-lb | 338.9545 N·m |
| 300 ft-lb | 406.7454 N·m |
| 400 ft-lb | 542.3272 N·m |
| 500 ft-lb | 677.909 N·m |
How to convert newton-meters to foot-pounds
ft-lb = Nm × 0.737562
Nm = ft-lb × 1.355818
A foot-pound is one pound-force (4.44822 N) applied at one foot (0.3048 m) from the pivot, which is 4.44822 × 0.3048 = 1.355818 Nm. The factor follows directly from the definitions, so it is exact.
Worked examples
- An engine rated at 340 Nm of torque: 340 × 0.737562 = 250.8 lb-ft.
- A 140 Nm wheel bolt spec: 140 × 0.737562 = 103.3 ft-lb.
- A 25 ft-lb spark plug spec: 25 × 1.355818 = 33.9 Nm.
Frequently Asked Questions
How do I convert Nm to ft-lbs?
Multiply newton-meters by 0.7376. 100 Nm × 0.7376 = 73.76 ft-lb. To convert foot-pounds to newton-meters, multiply by 1.3558.
How many ft-lbs is 100 Nm?
100 Nm is 73.76 ft-lb.
How many Nm is 80 ft-lbs?
80 ft-lb × 1.3558 = 108.47 Nm. Many passenger cars specify lug nut torque in the 76 to 100 ft-lb range (103 to 136 Nm), but always use the figure in your owner’s manual.
Are ft-lbs and lb-ft the same?
For torque, yes. Engineers often write lbf·ft or lb-ft for torque to distinguish it from the foot-pound as a unit of energy, but torque wrenches and service manuals use both labels for the same thing.
How do I convert Nm to inch-pounds?
Multiply newton-meters by 8.8507. Small fasteners are often specified in in-lb: 10 Nm is 88.5 in-lb. To get foot-pounds from inch-pounds, divide by 12.
Why do torque specs use both Nm and ft-lbs?
Nm is the SI unit used by most manufacturers worldwide, while ft-lb is still standard on American tools and in U.S. service manuals. Many torque wrenches carry both scales.
Sources and References
- NIST Special Publication 811, Guide for the Use of the International System of Units. Appendix B lists 1 lbf·ft = 1.355 818 N·m.