Convert Hour-degree Fahrenheit per BTU to Kelvin per watt
Convert Hour-degree Fahrenheit per BTU (h·°F/BTU) to Kelvin per watt (K/W) instantly and accurately.
Conversion Formula
K/W = h·°F/BTU × 1.895634241
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.
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.
Quick Reference Table
| Hour-degree Fahrenheit per BTU (h·°F/BTU) | Kelvin per watt (K/W) |
|---|---|
| 1 h·°F/BTU | 1.89563 K/W |
| 2 h·°F/BTU | 3.79127 K/W |
| 5 h·°F/BTU | 9.47817 K/W |
| 10 h·°F/BTU | 18.9563 K/W |
| 25 h·°F/BTU | 47.3909 K/W |
| 50 h·°F/BTU | 94.7817 K/W |
| 100 h·°F/BTU | 189.563 K/W |