Calculator
Nm to lb-ft Converter
Convert engine torque between newton-metres (Nm), pound-feet (lb-ft) and kilogram-metres (kgm), and see how torque and rpm make horsepower.
369 lb-ft. Held at 5,000 rpm, that torque makes 351 hp.
Torque and horsepower
Torque is the twisting force at the crank; power is how fast that work is done. Power is torque multiplied by engine speed: hp = lb-ft × rpm ÷ 5,252, or kW = Nm × rpm ÷ 9,549. That is why every lb-ft and hp curve crosses at 5,252 rpm, and why a high-revving engine can make big power from modest torque.
Turbocharged engines usually quote a flat torque plateau (for example 750 Nm from 1,800–5,600 rpm), while naturally aspirated engines peak higher up the rev range. "ft-lb" on US spec sheets means the same as lb-ft.
Formulas
- lb-ft = Nm × 0.737562 · Nm = lb-ft × 1.355818
- kgm = Nm × 0.101972 · Nm = kgm × 9.80665
Conversion table
| Nm | lb-ft | kgm |
|---|---|---|
| 200 Nm | 147.5 lb-ft | 20.4 kgm |
| 300 Nm | 221.3 lb-ft | 30.6 kgm |
| 400 Nm | 295.0 lb-ft | 40.8 kgm |
| 500 Nm | 368.8 lb-ft | 51.0 kgm |
| 600 Nm | 442.5 lb-ft | 61.2 kgm |
| 700 Nm | 516.3 lb-ft | 71.4 kgm |
| 800 Nm | 590.0 lb-ft | 81.6 kgm |
| 1,000 Nm | 737.6 lb-ft | 102.0 kgm |
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