Convert Millikelvin per watt to Hour-degree Fahrenheit per BTU
Convert Millikelvin per watt (mK/W) to Hour-degree Fahrenheit per BTU (h·°F/BTU) instantly and accurately.
Conversion Formula
h·°F/BTU = mK/W × 0.0005275279263
About Millikelvin per watt
The millikelvin per watt (mK/W) equals exactly 10⁻³ K/W. It is used for ultra-low thermal resistances in high-conductivity materials such as diamond heat spreaders (≈ 0.3 mK/W per mm thickness for 1 cm² area), liquid metal TIMs, and cryogenic heat links. Measuring at this scale requires precision power dissipation and calorimetric temperature sensing. 1 mK/W = 10⁻³ 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
| Millikelvin per watt (mK/W) | Hour-degree Fahrenheit per BTU (h·°F/BTU) |
|---|---|
| 1 mK/W | 0.000527528 h·°F/BTU |
| 2 mK/W | 0.00105506 h·°F/BTU |
| 5 mK/W | 0.00263764 h·°F/BTU |
| 10 mK/W | 0.00527528 h·°F/BTU |
| 25 mK/W | 0.0131882 h·°F/BTU |
| 50 mK/W | 0.0263764 h·°F/BTU |
| 100 mK/W | 0.0527528 h·°F/BTU |