Convert Calories per Hour to Boiler Horsepower
Convert Calories per Hour (cal/h) to Boiler Horsepower (BHP) instantly and accurately.
Conversion Formula
BHP = cal/h × 1.185458019e-7
About Calories per Hour
One calorie per hour (cal/h) equals exactly 0.001163 W - the rate of transferring one thermochemical calorie (4.1868 J) per hour. A resting adult generates ~70-80 W ≈ 60,000-70,000 cal/h of heat. The unit appears in European and Asian HVAC standards for small-appliance heat loads and in laboratory calorimetry reporting metabolic activity of small organisms. Calorimetric enzyme assays also express catalytic heat in cal/h per unit enzyme. 1 cal/h = 0.001163 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
| Calories per Hour (cal/h) | Boiler Horsepower (BHP) |
|---|---|
| 1 cal/h | 1.185 × 10-7 BHP |
| 2 cal/h | 2.371 × 10-7 BHP |
| 5 cal/h | 5.927 × 10-7 BHP |
| 10 cal/h | 1.185 × 10-6 BHP |
| 25 cal/h | 2.964 × 10-6 BHP |
| 50 cal/h | 5.927 × 10-6 BHP |
| 100 cal/h | 1.185 × 10-5 BHP |