Convert International table BTU per pound per degree Fahrenheit to Millijoule per kilogram kelvin
Convert International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) to Millijoule per kilogram kelvin (mJ/(kg·K)) instantly and accurately.
Conversion Formula
mJ/(kg·K) = BTU(IT)/(lb·°F) × 4186800
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 Millijoule per kilogram kelvin
The millijoule per kilogram kelvin (mJ/(kg·K)) equals exactly 10⁻³ J/(kg·K). Used for very light gases at extreme conditions and in precision calorimetry where tiny heat capacities must be measured. Rarely encountered in standard engineering but useful when expressing specific heat of dilute aerosols or highly rarefied media. 1 mJ/(kg·K) = 10⁻³ J/(kg·K).
Quick Reference Table
| International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) | Millijoule per kilogram kelvin (mJ/(kg·K)) |
|---|---|
| 1 BTU(IT)/(lb·°F) | 4186800 mJ/(kg·K) |
| 2 BTU(IT)/(lb·°F) | 8373600 mJ/(kg·K) |
| 5 BTU(IT)/(lb·°F) | 20934000 mJ/(kg·K) |
| 10 BTU(IT)/(lb·°F) | 41868000 mJ/(kg·K) |
| 25 BTU(IT)/(lb·°F) | 104670000 mJ/(kg·K) |
| 50 BTU(IT)/(lb·°F) | 209340000 mJ/(kg·K) |
| 100 BTU(IT)/(lb·°F) | 418680000 mJ/(kg·K) |