Convert Degree Fahrenheit per watt to Kelvin per horsepower
Convert Degree Fahrenheit per watt (°F/W) to Kelvin per horsepower (K/hp) instantly and accurately.
Conversion Formula
K/hp = °F/W × 414.2777064
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.
About Kelvin per horsepower
The kelvin per horsepower (K/hp) equals 1/745.69987158 K/W ≈ 1.341 × 10⁻³ K/W. Used in mechanical engineering when rating engine cooling systems, gearbox oil coolers, and hydraulic heat exchangers alongside power expressed in horsepower. A transmission cooler at 0.05 K/hp raises fluid temperature 3.73 K per 75 hp of friction losses. 1 K/hp ≈ 1.341 × 10⁻³ K/W.
Quick Reference Table
| Degree Fahrenheit per watt (°F/W) | Kelvin per horsepower (K/hp) |
|---|---|
| 1 °F/W | 414.278 K/hp |
| 2 °F/W | 828.555 K/hp |
| 5 °F/W | 2071.39 K/hp |
| 10 °F/W | 4142.78 K/hp |
| 25 °F/W | 10356.9 K/hp |
| 50 °F/W | 20713.9 K/hp |
| 100 °F/W | 41427.8 K/hp |