Convert International table calorie per gram per degree Celsius to Thermochemical BTU per pound per degree Fahrenheit
Convert International table calorie per gram per degree Celsius (cal(IT)/(g·°C)) to Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) instantly and accurately.
Conversion Formula
BTU(th)/(lb·°F) = cal(IT)/(g·°C) × 1.000669216
About International table calorie per gram per degree Celsius
The international table calorie per gram per degree Celsius (cal(IT)/(g·°C)) equals exactly 4186.8 J/(kg·K) (1 cal(IT) = 4.1868 J). Standard in steam tables, international thermodynamic references, and pre-SI calorimetry. Slightly larger than the thermochemical variant. Water: 1 cal(IT)/(g·°C) at ≈15 °C. 1 cal(IT)/(g·°C) = 4186.8 J/(kg·K) = 1 kcal(IT)/(kg·°C).
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 calorie per gram per degree Celsius (cal(IT)/(g·°C)) | Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) |
|---|---|
| 1 cal(IT)/(g·°C) | 1.00067 BTU(th)/(lb·°F) |
| 2 cal(IT)/(g·°C) | 2.00134 BTU(th)/(lb·°F) |
| 5 cal(IT)/(g·°C) | 5.00335 BTU(th)/(lb·°F) |
| 10 cal(IT)/(g·°C) | 10.0067 BTU(th)/(lb·°F) |
| 25 cal(IT)/(g·°C) | 25.0167 BTU(th)/(lb·°F) |
| 50 cal(IT)/(g·°C) | 50.0335 BTU(th)/(lb·°F) |
| 100 cal(IT)/(g·°C) | 100.067 BTU(th)/(lb·°F) |