Convert Kelvin per watt to Hour-degree Fahrenheit per BTU
Convert Kelvin per watt (K/W) to Hour-degree Fahrenheit per BTU (h·°F/BTU) instantly and accurately.
Conversion Formula
h·°F/BTU = K/W × 0.5275279263
About Kelvin per watt
The kelvin per watt (K/W) is the SI coherent unit for thermal resistance, defined as the temperature rise (K) per unit of steady-state power dissipation (W). Used universally in electronic component datasheets (junction-to-ambient, junction-to-case), heat sink ratings, and thermal circuit analysis. A CPU heatsink at 0.3 K/W raises temperature 30 K per 100 W. 1 K/W = 1 °C/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
| Kelvin per watt (K/W) | Hour-degree Fahrenheit per BTU (h·°F/BTU) |
|---|---|
| 1 K/W | 0.527528 h·°F/BTU |
| 2 K/W | 1.05506 h·°F/BTU |
| 5 K/W | 2.63764 h·°F/BTU |
| 10 K/W | 5.27528 h·°F/BTU |
| 25 K/W | 13.1882 h·°F/BTU |
| 50 K/W | 26.3764 h·°F/BTU |
| 100 K/W | 52.7528 h·°F/BTU |