Convert Degree Celsius per watt to Hour-degree Fahrenheit per BTU
Convert Degree Celsius per watt (°C/W) to Hour-degree Fahrenheit per BTU (h·°F/BTU) instantly and accurately.
Conversion Formula
h·°F/BTU = °C/W × 0.5275279263
About Degree Celsius per watt
The degree Celsius per watt (°C/W) equals exactly 1 K/W since temperature intervals 1 °C = 1 K. It is the dominant notation in semiconductor, LED, and power electronics datasheets worldwide. Thermal resistance values such as RθJA (junction-to-ambient) and RθJC (junction-to-case) are almost universally quoted in °C/W. A package at 50 °C/W dissipating 2 W yields ΔT = 100 °C. 1 °C/W = 1 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
| Degree Celsius per watt (°C/W) | Hour-degree Fahrenheit per BTU (h·°F/BTU) |
|---|---|
| 1 °C/W | 0.527528 h·°F/BTU |
| 2 °C/W | 1.05506 h·°F/BTU |
| 5 °C/W | 2.63764 h·°F/BTU |
| 10 °C/W | 5.27528 h·°F/BTU |
| 25 °C/W | 13.1882 h·°F/BTU |
| 50 °C/W | 26.3764 h·°F/BTU |
| 100 °C/W | 52.7528 h·°F/BTU |