Convert International table BTU per pound per degree Fahrenheit to Thermochemical BTU per pound per degree Fahrenheit
Convert International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) to Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) instantly and accurately.
Conversion Formula
BTU(th)/(lb·°F) = BTU(IT)/(lb·°F) × 1.000669216
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 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
| International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) | Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) |
|---|---|
| 1 BTU(IT)/(lb·°F) | 1.00067 BTU(th)/(lb·°F) |
| 2 BTU(IT)/(lb·°F) | 2.00134 BTU(th)/(lb·°F) |
| 5 BTU(IT)/(lb·°F) | 5.00335 BTU(th)/(lb·°F) |
| 10 BTU(IT)/(lb·°F) | 10.0067 BTU(th)/(lb·°F) |
| 25 BTU(IT)/(lb·°F) | 25.0167 BTU(th)/(lb·°F) |
| 50 BTU(IT)/(lb·°F) | 50.0335 BTU(th)/(lb·°F) |
| 100 BTU(IT)/(lb·°F) | 100.067 BTU(th)/(lb·°F) |