Convert Thermochemical BTU per pound per degree Fahrenheit to Kilojoule per kilogram kelvin
Convert Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) to Kilojoule per kilogram kelvin (kJ/(kg·K)) instantly and accurately.
Conversion Formula
kJ/(kg·K) = BTU(th)/(lb·°F) × 4.184
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).
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).
Quick Reference Table
| Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) | Kilojoule per kilogram kelvin (kJ/(kg·K)) |
|---|---|
| 1 BTU(th)/(lb·°F) | 4.184 kJ/(kg·K) |
| 2 BTU(th)/(lb·°F) | 8.368 kJ/(kg·K) |
| 5 BTU(th)/(lb·°F) | 20.92 kJ/(kg·K) |
| 10 BTU(th)/(lb·°F) | 41.84 kJ/(kg·K) |
| 25 BTU(th)/(lb·°F) | 104.6 kJ/(kg·K) |
| 50 BTU(th)/(lb·°F) | 209.2 kJ/(kg·K) |
| 100 BTU(th)/(lb·°F) | 418.4 kJ/(kg·K) |