Convert Calories per Hour to Watts
Convert Calories per Hour (cal/h) to Watts (W) instantly and accurately.
Conversion Formula
W = cal/h × 0.001163
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 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.
Quick Reference Table
| Calories per Hour (cal/h) | Watts (W) |
|---|---|
| 1 cal/h | 0.001163 W |
| 2 cal/h | 0.002326 W |
| 5 cal/h | 0.005815 W |
| 10 cal/h | 0.01163 W |
| 25 cal/h | 0.029075 W |
| 50 cal/h | 0.05815 W |
| 100 cal/h | 0.1163 W |