Convert Kelvin per horsepower to Hour-degree Fahrenheit per BTU
Convert Kelvin per horsepower (K/hp) to Hour-degree Fahrenheit per BTU (h·°F/BTU) instantly and accurately.
Conversion Formula
h·°F/BTU = K/hp × 0.0007074266021
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.
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 horsepower (K/hp) | Hour-degree Fahrenheit per BTU (h·°F/BTU) |
|---|---|
| 1 K/hp | 0.000707427 h·°F/BTU |
| 2 K/hp | 0.00141485 h·°F/BTU |
| 5 K/hp | 0.00353713 h·°F/BTU |
| 10 K/hp | 0.00707427 h·°F/BTU |
| 25 K/hp | 0.0176857 h·°F/BTU |
| 50 K/hp | 0.0353713 h·°F/BTU |
| 100 K/hp | 0.0707427 h·°F/BTU |