Convert Kilojoule per kilogram kelvin to Thermochemical BTU per pound per degree Fahrenheit
Convert Kilojoule per kilogram kelvin (kJ/(kg·K)) to Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) instantly and accurately.
Conversion Formula
BTU(th)/(lb·°F) = kJ/(kg·K) × 0.2390057361
About Kilojoule per kilogram kelvin
The kilojoule per kilogram kelvin (kJ/(kg·K)) equals exactly 1000 J/(kg·K). The most common unit in engineering thermodynamics textbooks and technical data sheets: water ≈4.182, steam ≈2.08, dry air ≈1.005 kJ/(kg·K). Found throughout ASHRAE, ISO, and EN standards for heat exchanger and HVAC design. 1 kJ/(kg·K) = 1000 J/(kg·K) = 1 kJ/(kg·°C).
About Thermochemical BTU per pound per degree Fahrenheit
The thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) equals exactly 4184 J/(kg·K) (derived: 1 BTU(th) = 1054.350264 J; /lb/°F). Numerically identical to cal(th)/(g·°C) because both are defined via the thermochemical calorie. Used in older American thermodynamic tables. Water ≈1 BTU(th)/(lb·°F). 1 BTU(th)/(lb·°F) = 4184 J/(kg·K).
Quick Reference Table
| Kilojoule per kilogram kelvin (kJ/(kg·K)) | Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) |
|---|---|
| 1 kJ/(kg·K) | 0.239006 BTU(th)/(lb·°F) |
| 2 kJ/(kg·K) | 0.478011 BTU(th)/(lb·°F) |
| 5 kJ/(kg·K) | 1.19503 BTU(th)/(lb·°F) |
| 10 kJ/(kg·K) | 2.39006 BTU(th)/(lb·°F) |
| 25 kJ/(kg·K) | 5.97514 BTU(th)/(lb·°F) |
| 50 kJ/(kg·K) | 11.9503 BTU(th)/(lb·°F) |
| 100 kJ/(kg·K) | 23.9006 BTU(th)/(lb·°F) |