Convert Calories per Hour to Metric Horsepower
Convert Calories per Hour (cal/h) to Metric Horsepower (PS) instantly and accurately.
Conversion Formula
PS = cal/h × 1.581239941e-6
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 Metric Horsepower
The metric horsepower (PS/CV/pk) equals exactly 75 kgf·m/s = 735.49875 W - the European equivalent of mechanical horsepower, defined as lifting 75 kg by 1 m/s. It was the DIN 66036 standard for European automotive ratings until the EU mandated kW. A 100 PS car produces 73.55 kW; 200 PS = 147.1 kW. The ~1.4% difference from mechanical hp (745.7 W) means a 100 PS car rates as 98.6 mechanical hp. German car advertising still shows PS parenthetically alongside kW. 1 PS = 735.49875 W.
Quick Reference Table
| Calories per Hour (cal/h) | Metric Horsepower (PS) |
|---|---|
| 1 cal/h | 1.581 × 10-6 PS |
| 2 cal/h | 3.162 × 10-6 PS |
| 5 cal/h | 7.906 × 10-6 PS |
| 10 cal/h | 1.581 × 10-5 PS |
| 25 cal/h | 3.953 × 10-5 PS |
| 50 cal/h | 7.906 × 10-5 PS |
| 100 cal/h | 0.000158124 PS |