Convert Joule per kilogram kelvin to Thermochemical BTU per pound per degree Fahrenheit
Convert Joule per kilogram kelvin (J/(kg·K)) to Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) instantly and accurately.
Conversion Formula
BTU(th)/(lb·°F) = J/(kg·K) × 0.0002390057361
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 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
| Joule per kilogram kelvin (J/(kg·K)) | Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) |
|---|---|
| 1 J/(kg·K) | 0.000239006 BTU(th)/(lb·°F) |
| 2 J/(kg·K) | 0.000478011 BTU(th)/(lb·°F) |
| 5 J/(kg·K) | 0.00119503 BTU(th)/(lb·°F) |
| 10 J/(kg·K) | 0.00239006 BTU(th)/(lb·°F) |
| 25 J/(kg·K) | 0.00597514 BTU(th)/(lb·°F) |
| 50 J/(kg·K) | 0.0119503 BTU(th)/(lb·°F) |
| 100 J/(kg·K) | 0.0239006 BTU(th)/(lb·°F) |