Torque Unit Conversion
Quick answer: 1 N·m ≈ 0.73756 lbf·ft ≈ 8.8507 lbf·in, 1 lbf·ft ≈ 1.35582 N·m, 1 kgf·m = 9.80665 N·m and 1 N·m = 100 N·cm.
N·m, kN·m, N·cm, kgf·m, lbf·ft, lbf·in and ozf·in – tightening torque for bolts, engines and tools.
How the calculation works
Enter a torque and choose the starting unit (for example N·m or lbf·ft). The table shows the same torque in newton metres and multiples, kilogram-force metres, dyne centimetres, pound-force feet and inches and ounce-force inches.
Formula and assumptions
Torque is force × lever arm, with the base unit N·m. 1 lbf·ft = 4.4482216152605 N × 0.3048 m = 1.3558179483 N·m; 1 lbf·in = 0.112984829 N·m; 1 kgf·m = 9.80665 N·m.
More worked examples
- Car wheel nuts at 110 N·m: 110 × 0.7376 ≈ 81.1 lbf·ft.
- An M8 (8.8) bolt at 25 N·m ≈ 221 lbf·in.
- A drill at 60 N·m = 6,000 N·cm ≈ 6.12 kgf·m.
- An engine at 300 lbf·ft ≈ 406.7 N·m.
Units of torque
| Unit | in N·m | Other |
|---|---|---|
| 1 N·m | 1 | 0.7376 lbf·ft |
| 1 N·cm | 0.01 | 0.0885 lbf·in |
| 1 kN·m | 1,000 | 737.56 lbf·ft |
| 1 kgf·m | 9.80665 | 7.233 lbf·ft |
| 1 lbf·ft | 1.35582 | 12 lbf·in |
| 1 lbf·in | 0.112985 | 16 ozf·in |
Common mistakes
- Confusing lbf·ft and lbf·in (a factor of 12).
- Mixing torque (N·m) with energy (J) even though they share a dimension.
- Treating 1 kgf·m as 10 N·m.
Frequently asked questions
How many lbf·ft is 1 N·m?
1 N·m ≈ 0.7376 lbf·ft and 1 lbf·ft ≈ 1.3558 N·m.
How do I convert in-lb to N·m?
Multiply by 0.112985: 100 lbf·in ≈ 11.3 N·m.
How many N·m is 1 kgf·m?
1 kgf·m = 9.80665 N·m (kilogram-force × metre).
Are N·m and joule the same unit?
Dimensionally yes, but N·m is used for torque and J for work and energy.
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Publisher: Art-Visum d.o.o. · Content reviewed:
Calculations use common consumption rates and manufacturers' technical data sheets; results are estimates. Methodology · Standards · About