1 lb-ft = 1.35582 N·m (pound-foot → newton-meter)
1 lb-ft = 1.35582 N·m
1 pound-foot equals 1.35582 newton-meters. To convert pound-feet to newton-meters, multiply the pound-foot value by 1.35582. For quick reference: 1 lb-ft = 1.35582 N·m, 5 lb-ft = 6.77909 N·m, 10 lb-ft = 13.5582 N·m, 100 lb-ft = 135.582 N·m.
Newton-meters = Pound-feet × 1.35582Pound-feet to newton-metres multiplies by 1.355817948. A 100 lbf·ft V8 torque rating is 135.6 N·m; a 25 lbf·ft tightening spec is 33.9 N·m. Used every time a US-sourced repair manual needs to be applied with a metric torque wrench. The factor is exact via 1 lbf = 4.4482216152605 N and 1 ft = 0.3048 m. Most calibrated wrenches handle both scales — confirm which scale is active before final tightening.
Marine outboard manufacturers convert US-market torque ratings for European boat builders: a 250 lb-ft outboard's peak torque figure becomes 338.9 N·m on the CE-compliant spec sheet sold into continental Europe, since EU boat-building regulations and hull-manufacturer engineering documents are written exclusively in SI units regardless of where the engine itself was designed.
Start with your value in pound-feet.
Multiply the pound-foot value by 1.35582. This is the exact conversion factor from pound-feet to newton-meters.
The product is your value in newton-meters. For example, 5 lb-ft × 1.35582 = 6.77909 N·m.
The exact factor from pound-feet to newton-meters is 1.35582.
Newton-meters = Pound-feet × 1.35582
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Pound-feet (lb-ft) | Newton-meters (N·m) |
|---|---|
| 0.1 lb-ft | 0.13558 N·m |
| 0.5 lb-ft | 0.67791 N·m |
| 1 lb-ft | 1.3558 N·m |
| 2 lb-ft | 2.7116 N·m |
| 5 lb-ft | 6.7791 N·m |
| 8 lb-ft | 10.847 N·m |
| 10 lb-ft | 13.558 N·m |
| 15 lb-ft | 20.337 N·m |
| 20 lb-ft | 27.116 N·m |
| 25 lb-ft | 33.895 N·m |
| 30 lb-ft | 40.675 N·m |
| 40 lb-ft | 54.233 N·m |
| 50 lb-ft | 67.791 N·m |
| 60 lb-ft | 81.349 N·m |
| 75 lb-ft | 101.69 N·m |
| 90 lb-ft | 122.02 N·m |
| 100 lb-ft | 135.58 N·m |
| 125 lb-ft | 169.48 N·m |
| 150 lb-ft | 203.37 N·m |
| 175 lb-ft | 237.27 N·m |
| 200 lb-ft | 271.16 N·m |
| 225 lb-ft | 305.06 N·m |
| 250 lb-ft | 338.95 N·m |
| 300 lb-ft | 406.75 N·m |
| 350 lb-ft | 474.54 N·m |
| 400 lb-ft | 542.33 N·m |
| 450 lb-ft | 610.12 N·m |
| 500 lb-ft | 677.91 N·m |
| 600 lb-ft | 813.49 N·m |
| 700 lb-ft | 949.07 N·m |
| 800 lb-ft | 1084.7 N·m |
| 900 lb-ft | 1220.2 N·m |
| 1000 lb-ft | 1355.8 N·m |
| 1200 lb-ft | 1627 N·m |
| 1500 lb-ft | 2033.7 N·m |
| 1800 lb-ft | 2440.5 N·m |
| 2000 lb-ft | 2711.6 N·m |
| 2500 lb-ft | 3389.5 N·m |
| 3000 lb-ft | 4067.5 N·m |
| 5000 lb-ft | 6779.1 N·m |
| 7500 lb-ft | 10169 N·m |
| 10000 lb-ft | 13558 N·m |
| 15000 lb-ft | 20337 N·m |
| 20000 lb-ft | 27116 N·m |
| 25000 lb-ft | 33895 N·m |
| 50000 lb-ft | 67791 N·m |
| 75000 lb-ft | 101686 N·m |
| 100000 lb-ft | 135582 N·m |
| 200000 lb-ft | 271164 N·m |
| 500000 lb-ft | 677909 N·m |
The pound-foot (lb-ft) is the customary torque unit in the United States. It equals exactly 1.355817948 N·m — derived from the pound-force (4.4482216152605 N) times the foot (0.3048 m). Often informally written 'ft-lb' or 'foot-pound', which technically denotes energy not torque, but the convention is universal in automotive spec sheets.
The newton-meter (N·m) is the SI derived unit of torque — the moment of force exerted by one newton applied at one meter of perpendicular distance. The metric standard for every modern engineering spec sheet.
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