Convert Foot-Pounds per Second to Watts
Convert Foot-Pounds per Second (ft⋅lbf/s) to Watts (W) instantly and accurately.
Conversion Formula
W = ft⋅lbf/s × 1.355817948
About Foot-Pounds per Second
One foot-pound per second (ft·lbf/s) ≈ 1.3558 W - the natural power unit in the foot-pound-second (FPS) system. Since 1 mechanical horsepower = exactly 550 ft·lbf/s, the conversion 1 ft·lbf/s = 1/550 hp is exact. Used in FPS structural and fluid dynamics: beam deflection power, pump and turbine output, and ballistic energy-transfer calculations. 19th-century American industry rated waterwheel output in ft·lbf/s before horsepower standardisation. 1 ft·lbf/s = 1.35582 W.
About Watts
The watt (W) is the SI unit of power - 1 J/s - named after James Watt (1736-1819). Familiar power levels: smartphone charging 5-65 W; laptop 15-100 W; microwave 700-1,200 W; electric kettle 2,000-3,000 W; human resting metabolism ~80 W; peak sprint ~2,000 W. The now-obsolete 100 W incandescent bulb is replaced by a 10-15 W LED producing the same light. In AC circuits, reactive power uses the var and apparent power the VA, both derived from watts. 1 W = 1 J/s = 1 kg·m²/s³.
Quick Reference Table
| Foot-Pounds per Second (ft⋅lbf/s) | Watts (W) |
|---|---|
| 1 ft⋅lbf/s | 1.35582 W |
| 2 ft⋅lbf/s | 2.71164 W |
| 5 ft⋅lbf/s | 6.77909 W |
| 10 ft⋅lbf/s | 13.5582 W |
| 25 ft⋅lbf/s | 33.8954 W |
| 50 ft⋅lbf/s | 67.7909 W |
| 100 ft⋅lbf/s | 135.582 W |