Convert Foot-Pounds per Minute to Boiler Horsepower
Convert Foot-Pounds per Minute (ft⋅lbf/min) to Boiler Horsepower (BHP) instantly and accurately.
Conversion Formula
BHP = ft⋅lbf/min × 2.303332272e-6
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 Boiler Horsepower
One boiler horsepower (BHP) ≈ 9,810 W = 33,475 BTU/h - the power to evaporate 34.5 lb of water per hour at 212°F, standardised by ASME for rating steam boilers. A small office building needs 10-50 BHP; a hospital or large plant 200-2,000 BHP. Critically, 1 BHP is ~13.1× larger than 1 mechanical horsepower (746 W) - a dangerous confusion when specifying heating equipment. 1 BHP ≈ 9,810.6 W.
Quick Reference Table
| Foot-Pounds per Minute (ft⋅lbf/min) | Boiler Horsepower (BHP) |
|---|---|
| 1 ft⋅lbf/min | 2.303 × 10-6 BHP |
| 2 ft⋅lbf/min | 4.607 × 10-6 BHP |
| 5 ft⋅lbf/min | 1.152 × 10-5 BHP |
| 10 ft⋅lbf/min | 2.303 × 10-5 BHP |
| 25 ft⋅lbf/min | 5.758 × 10-5 BHP |
| 50 ft⋅lbf/min | 0.000115167 BHP |
| 100 ft⋅lbf/min | 0.000230333 BHP |