Convert Hour-degree Celsius per kilocalorie to Hour-degree Fahrenheit per BTU
Convert Hour-degree Celsius per kilocalorie (h·°C/kcal) to Hour-degree Fahrenheit per BTU (h·°F/BTU) instantly and accurately.
Conversion Formula
h·°F/BTU = h·°C/kcal × 0.45359237
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 Superseded by K/W and h·°C/W in modern standards. 1 h·°C/kcal ≈ 0.8598 K/W.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 Hour-degree Fahrenheit per BTU
The h·°F/BTU equals (5/9 × 3600)/1055.05585262 K/W ≈ 1.8956 K/W. It is the traditional US unit for thermal resistance in HVAC, building science, and insulation engineering. A pipe fitting with R = 1 h·°F/BTU passes 1 BTU/h per °F driving difference. Appears in ASHRAE handbooks, ASTM C177, and older US plumbing codes. 1 h·°F/BTU ≈ 1.8956 K/W.
Quick Reference Table
| Hour-degree Celsius per kilocalorie (h·°C/kcal) | Hour-degree Fahrenheit per BTU (h·°F/BTU) |
|---|---|
| 1 h·°C/kcal | 0.453592 h·°F/BTU |
| 2 h·°C/kcal | 0.907185 h·°F/BTU |
| 5 h·°C/kcal | 2.26796 h·°F/BTU |
| 10 h·°C/kcal | 4.53592 h·°F/BTU |
| 25 h·°C/kcal | 11.3398 h·°F/BTU |
| 50 h·°C/kcal | 22.6796 h·°F/BTU |
| 100 h·°C/kcal | 45.3592 h·°F/BTU |