Convert International table BTU per pound per degree Fahrenheit to Kilojoule per kilogram kelvin
Convert International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) to Kilojoule per kilogram kelvin (kJ/(kg·K)) instantly and accurately.
Conversion Formula
kJ/(kg·K) = BTU(IT)/(lb·°F) × 4.1868
About International table BTU per pound per degree Fahrenheit
The international table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) equals (1055.05585262 × 9)/(0.45359237 × 5) J/(kg·K) = 4186.8 J/(kg·K). The standard US unit for specific heat capacity in ASHRAE, ASTM, and mechanical engineering references. Water: 1.000 BTU(IT)/(lb·°F); steel: ≈0.108; air: ≈0.240. 1 BTU(IT)/(lb·°F) = 4186.8 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
| International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) | Kilojoule per kilogram kelvin (kJ/(kg·K)) |
|---|---|
| 1 BTU(IT)/(lb·°F) | 4.1868 kJ/(kg·K) |
| 2 BTU(IT)/(lb·°F) | 8.3736 kJ/(kg·K) |
| 5 BTU(IT)/(lb·°F) | 20.934 kJ/(kg·K) |
| 10 BTU(IT)/(lb·°F) | 41.868 kJ/(kg·K) |
| 25 BTU(IT)/(lb·°F) | 104.67 kJ/(kg·K) |
| 50 BTU(IT)/(lb·°F) | 209.34 kJ/(kg·K) |
| 100 BTU(IT)/(lb·°F) | 418.68 kJ/(kg·K) |