Convert Foot-Pounds per Minute to Electrical Horsepower
Convert Foot-Pounds per Minute (ft⋅lbf/min) to Electrical Horsepower (hp(E)) instantly and accurately.
Conversion Formula
hp(E) = ft⋅lbf/min × 3.029083888e-5
About Foot-Pounds per Minute
One foot-pound per minute (ft·lbf/min) ≈ 0.02260 W. Its historical importance is large: James Watt rated mill horses at ~33,000 ft·lbf/min sustained output and defined 1 mechanical horsepower as exactly 33,000 ft·lbf/min (= 550 ft·lbf/s). The unit is still used for machine-tool power, hydraulic pump output, and low-speed actuator performance in US customary calculations: torque (ft·lbf) × RPM = power in ft·lbf/min. 1 hp = 33,000 ft·lbf/min.
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 Minute (ft⋅lbf/min) | Electrical Horsepower (hp(E)) |
|---|---|
| 1 ft⋅lbf/min | 3.029 × 10-5 hp(E) |
| 2 ft⋅lbf/min | 6.058 × 10-5 hp(E) |
| 5 ft⋅lbf/min | 0.000151454 hp(E) |
| 10 ft⋅lbf/min | 0.000302908 hp(E) |
| 25 ft⋅lbf/min | 0.000757271 hp(E) |
| 50 ft⋅lbf/min | 0.00151454 hp(E) |
| 100 ft⋅lbf/min | 0.00302908 hp(E) |