Convert Petawatts to Calories per Hour
Convert Petawatts (PW) to Calories per Hour (cal/h) instantly and accurately.
Conversion Formula
cal/h = PW × 8.598452279e+17
About Petawatts
A petawatt (PW) is 10¹⁵ W. Total solar power intercepted by Earth is ~174 PW. The world's most powerful laser pulses operate at petawatt peak power via chirped pulse amplification (CPA, 2018 Nobel Prize in Physics): China's SULF demonstrated 10 PW in 2019; ELI-NP targets 10 PW. These PW pulses last femtoseconds and create plasma temperatures of billions of kelvin in laboratory targets. Gamma-ray bursts radiate 10²⁴-10²⁷ W at peak - thousands to billions of times the petawatt scale. 1 PW = 10¹⁵ W.
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.
Quick Reference Table
| Petawatts (PW) | Calories per Hour (cal/h) |
|---|---|
| 1 PW | 8.598 × 1017 cal/h |
| 2 PW | 1.72 × 1018 cal/h |
| 5 PW | 4.299 × 1018 cal/h |
| 10 PW | 8.598 × 1018 cal/h |
| 25 PW | 2.15 × 1019 cal/h |
| 50 PW | 4.299 × 1019 cal/h |
| 100 PW | 8.598 × 1019 cal/h |