Convert Foot-Pounds per Second to Electrical Horsepower
Convert Foot-Pounds per Second (ft⋅lbf/s) to Electrical Horsepower (hp(E)) instantly and accurately.
Conversion Formula
hp(E) = ft⋅lbf/s × 0.001817450333
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 Electrical Horsepower
The electrical horsepower (hp(E)) is defined as exactly 746 W - the US NEMA rounding used on electric motor nameplates. It differs from mechanical hp (745.7 W) by only 0.04%. Every NEMA-rated motor in the US carries a horsepower nameplate: a '5 hp motor' delivers 5 × 746 = 3,730 W. NEC motor branch-circuit sizing tables, overload relay selection, and starter ratings are all based on hp(E). Despite global kW adoption, US industrial motor infrastructure remains standardised in electrical horsepower. 1 hp(E) = 746 W.
Quick Reference Table
| Foot-Pounds per Second (ft⋅lbf/s) | Electrical Horsepower (hp(E)) |
|---|---|
| 1 ft⋅lbf/s | 0.00181745 hp(E) |
| 2 ft⋅lbf/s | 0.0036349 hp(E) |
| 5 ft⋅lbf/s | 0.00908725 hp(E) |
| 10 ft⋅lbf/s | 0.0181745 hp(E) |
| 25 ft⋅lbf/s | 0.0454363 hp(E) |
| 50 ft⋅lbf/s | 0.0908725 hp(E) |
| 100 ft⋅lbf/s | 0.181745 hp(E) |