Convert Thermochemical BTU per pound per degree Fahrenheit to International table calorie per gram per degree Celsius
Convert Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) to International table calorie per gram per degree Celsius (cal(IT)/(g·°C)) instantly and accurately.
Conversion Formula
cal(IT)/(g·°C) = BTU(th)/(lb·°F) × 0.9993312315
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).
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).
Quick Reference Table
| Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) | International table calorie per gram per degree Celsius (cal(IT)/(g·°C)) |
|---|---|
| 1 BTU(th)/(lb·°F) | 0.999331 cal(IT)/(g·°C) |
| 2 BTU(th)/(lb·°F) | 1.99866 cal(IT)/(g·°C) |
| 5 BTU(th)/(lb·°F) | 4.99666 cal(IT)/(g·°C) |
| 10 BTU(th)/(lb·°F) | 9.99331 cal(IT)/(g·°C) |
| 25 BTU(th)/(lb·°F) | 24.9833 cal(IT)/(g·°C) |
| 50 BTU(th)/(lb·°F) | 49.9666 cal(IT)/(g·°C) |
| 100 BTU(th)/(lb·°F) | 99.9331 cal(IT)/(g·°C) |