Convert Hour-degree Celsius per kilocalorie to Degree Fahrenheit per watt
Convert Hour-degree Celsius per kilocalorie (h·°C/kcal) to Degree Fahrenheit per watt (°F/W) instantly and accurately.
Conversion Formula
°F/W = h·°C/kcal × 1.54772141
About Hour-degree Celsius per kilocalorie
The h·°C/kcal equals 3600/4186.8 K/W ≈ 0.8598 K/W. Used in pre-SI European engineering literature (French, German, Italian) for heat transfer system calculations. A boiler with 1 h·°C/kcal resistance passes 1 kcal/h per °C temperature difference. Superseded by K/W and h·°C/W in modern standards. 1 h·°C/kcal ≈ 0.8598 K/W.
About Degree Fahrenheit per watt
The degree Fahrenheit per watt (°F/W) equals exactly 5/9 K/W ≈ 0.5556 K/W. It appears in US power electronics datasheets and legacy JEDEC thermal specifications where junction-to-case resistance is reported in °F/W rather than °C/W or K/W. A device rated 5 °F/W has R = 5 × 5/9 ≈ 2.78 K/W. 1 °F/W = 5/9 K/W.
Quick Reference Table
| Hour-degree Celsius per kilocalorie (h·°C/kcal) | Degree Fahrenheit per watt (°F/W) |
|---|---|
| 1 h·°C/kcal | 1.54772 °F/W |
| 2 h·°C/kcal | 3.09544 °F/W |
| 5 h·°C/kcal | 7.73861 °F/W |
| 10 h·°C/kcal | 15.4772 °F/W |
| 25 h·°C/kcal | 38.693 °F/W |
| 50 h·°C/kcal | 77.3861 °F/W |
| 100 h·°C/kcal | 154.772 °F/W |