What this converter does
This converter turns torque between pound-feet, newton-metres, pound-inches, kilogram-force metres and kilonewton-metres — instantly and with exact factors. Type a value, pick the units, and the answer updates as you type. Ideal for reading US torque specs into SI units.
One pound-foot equals 1.3558179483 newton-metres, a defined value. Torque is a twisting force, distinct from straight-line force — for engine power instead, see the HP to kW converter.
The units it covers
Every unit measures torque, so each converts through the newton-metre with a fixed ratio.
View all units & their values
| Unit | Symbol | Value | Mainly used |
|---|---|---|---|
| Pound-foot | lb-ft | 1.3558 | US/UK torque, fasteners, engines |
| Newton-metre | N·m | 1 | SI unit — engineering, engine specs |
| Pound-inch | lb-in | 0.11298 | Small fasteners, instruments |
| Kilogram-force metre | kgf·m | 9.80665 | Older European/Japanese specs |
| Kilonewton-metre | kN·m | 1000 | Structural moments, large torque |
The formula
Each unit has a fixed value in newton-metres, so any conversion goes through the N·m once:
result = value × factor_from ÷ factor_toWhere:
- value = the number you typed, in the “from” unit
- factor_from = the “from” unit’s value in N·m
- factor_to = the “to” unit’s value in N·m
Worked example
Convert 100 lb-ft to newton-metres.
1 lb-ft = 1.3558179483 N·m100 × 1.3558179483 = 135.58 N·mSo 100 pound-feet of torque is about 135.6 newton-metres.
The units in this example
An imperial torque unit — one pound-force at one foot from the pivot. Common on US and UK fastener and engine torque specs.
- 1 lb-ft = 1.3558 N·m
- 1 lb-ft = 12 lb-in
- 1 lb-ft ≈ 0.1383 kgf·m
- 100 lb-ft = 135.58 N·m
The SI unit of torque — one newton of force applied at one metre from the pivot. Standard for engineering and engine specifications worldwide.
- 1 N·m ≈ 0.7376 lb-ft
- 1 N·m ≈ 8.851 lb-in
- 1 N·m ≈ 0.10197 kgf·m
- 1 kN·m = 1,000 N·m