Convert Joule per kilogram kelvin to International table BTU per pound per degree Fahrenheit
Convert Joule per kilogram kelvin (J/(kg·K)) to International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) instantly and accurately.
Conversion Formula
BTU(IT)/(lb·°F) = J/(kg·K) × 0.0002388458966
About Joule per kilogram kelvin
The joule per kilogram kelvin (J/(kg·K)) is the SI coherent unit for specific heat capacity, defined by the relation Q = mcΔT. Water ≈4182, iron ≈449, aluminium ≈897, copper ≈385, glass ≈840 J/(kg·K). Referenced in ISO 31-4 and all major international standards. 1 J/(kg·K) = 1 J/(kg·°C) = 10⁻³ kJ/(kg·K).
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).
Quick Reference Table
| Joule per kilogram kelvin (J/(kg·K)) | International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) |
|---|---|
| 1 J/(kg·K) | 0.000238846 BTU(IT)/(lb·°F) |
| 2 J/(kg·K) | 0.000477692 BTU(IT)/(lb·°F) |
| 5 J/(kg·K) | 0.00119423 BTU(IT)/(lb·°F) |
| 10 J/(kg·K) | 0.00238846 BTU(IT)/(lb·°F) |
| 25 J/(kg·K) | 0.00597115 BTU(IT)/(lb·°F) |
| 50 J/(kg·K) | 0.0119423 BTU(IT)/(lb·°F) |
| 100 J/(kg·K) | 0.0238846 BTU(IT)/(lb·°F) |