Convert Mechanical Horsepower to Boiler Horsepower
Convert Mechanical Horsepower (hp) to Boiler Horsepower (BHP) instantly and accurately.
Conversion Formula
BHP = hp × 0.07600996498
About Mechanical Horsepower
The mechanical horsepower (hp) is exactly 550 ft·lbf/s ≈ 745.7 W - defined by James Watt by timing mine horses to set a comparable steam engine rating. A typical compact car produces 100-150 hp (75-112 kW); a sports car 300-600 hp; an F1 car ~1,000 hp (745 kW). SAE net horsepower is measured at the flywheel with all accessories fitted. Marine diesel engines, aircraft piston engines, and lawn equipment are still rated in hp. 1 hp = 550 ft·lbf/s = 745.6998715822704 W.
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
| Mechanical Horsepower (hp) | Boiler Horsepower (BHP) |
|---|---|
| 1 hp | 0.07601 BHP |
| 2 hp | 0.15202 BHP |
| 5 hp | 0.38005 BHP |
| 10 hp | 0.7601 BHP |
| 25 hp | 1.90025 BHP |
| 50 hp | 3.8005 BHP |
| 100 hp | 7.601 BHP |