Convert Watts to Boiler Horsepower
Convert Watts (W) to Boiler Horsepower (BHP) instantly and accurately.
Conversion Formula
BHP = W × 0.0001019310421
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.
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
| Watts (W) | Boiler Horsepower (BHP) |
|---|---|
| 1 W | 0.000101931 BHP |
| 2 W | 0.000203862 BHP |
| 5 W | 0.000509655 BHP |
| 10 W | 0.00101931 BHP |
| 25 W | 0.00254828 BHP |
| 50 W | 0.00509655 BHP |
| 100 W | 0.0101931 BHP |