Convert Minute-degree Fahrenheit per BTU to Degree Fahrenheit per watt
Convert Minute-degree Fahrenheit per BTU (min·°F/BTU) to Degree Fahrenheit per watt (°F/W) instantly and accurately.
Conversion Formula
°F/W = min·°F/BTU × 0.05686902722
About Minute-degree Fahrenheit per BTU
The minute-degree Fahrenheit per BTU (min·°F/BTU) equals (5/9 × 60)/1055.05585262 K/W ≈ 0.03159 K/W. Used in US refrigeration and air-conditioning engineering where capacity is expressed in BTU/min - 1 ton of refrigeration equals 200 BTU/min. Thermal resistance of evaporator and condenser circuits is conveniently quoted in this unit. 1 min·°F/BTU ≈ 0.03159 K/W = 60 s·°F/BTU.
About Degree Fahrenheit per watt
The degree Fahrenheit per watt (°F/W) equals exactly 5/9 K/W ≈ 0.5556 K/W. It appears in US power electronics datasheets and legacy JEDEC thermal specifications where junction-to-case resistance is reported in °F/W rather than °C/W or K/W. A device rated 5 °F/W has R = 5 × 5/9 ≈ 2.78 K/W. 1 °F/W = 5/9 K/W.
Quick Reference Table
| Minute-degree Fahrenheit per BTU (min·°F/BTU) | Degree Fahrenheit per watt (°F/W) |
|---|---|
| 1 min·°F/BTU | 0.056869 °F/W |
| 2 min·°F/BTU | 0.113738 °F/W |
| 5 min·°F/BTU | 0.284345 °F/W |
| 10 min·°F/BTU | 0.56869 °F/W |
| 25 min·°F/BTU | 1.42173 °F/W |
| 50 min·°F/BTU | 2.84345 °F/W |
| 100 min·°F/BTU | 5.6869 °F/W |