Convert International table calorie per centimetre per second per degree Celsius to BTU per hour per foot per degree Fahrenheit
Convert International table calorie per centimetre per second per degree Celsius (cal(IT)/(cm·s·°C)) to BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) instantly and accurately.
Conversion Formula
BTU/(h·ft·°F) = cal(IT)/(cm·s·°C) × 241.9088311
About International table calorie per centimetre per second per degree Celsius
The cal(IT)/(cm·s·°C) equals exactly 4.1868/0.01 = 418.68 W/(m·K) (1 international table calorie = 4.1868 J). Used in pre-SI thermodynamics, steam tables, and international heat transfer references. Copper: ≈0.920 cal(IT)/(cm·s·°C). Slightly larger than cal(th)/(cm·s·°C). 1 cal(IT)/(cm·s·°C) = 418.68 W/(m·K).
About BTU per hour per foot per degree Fahrenheit
The BTU/(h·ft·°F) equals (1055.05585262 × 9)/(3600 × 0.3048 × 5) W/(m·K) ≈1.7307 W/(m·K). Standard US thermal conductivity unit in ASHRAE Handbook and ASTM C1045. Copper: ≈223; carbon steel: ≈26; brick: ≈0.44; glass fibre insulation: ≈0.025 BTU/(h·ft·°F). 1 BTU/(h·ft·°F) = 12 BTU·in/(h·ft²·°F) ≈1.7307 W/(m·K).
Quick Reference Table
| International table calorie per centimetre per second per degree Celsius (cal(IT)/(cm·s·°C)) | BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) |
|---|---|
| 1 cal(IT)/(cm·s·°C) | 241.909 BTU/(h·ft·°F) |
| 2 cal(IT)/(cm·s·°C) | 483.818 BTU/(h·ft·°F) |
| 5 cal(IT)/(cm·s·°C) | 1209.54 BTU/(h·ft·°F) |
| 10 cal(IT)/(cm·s·°C) | 2419.09 BTU/(h·ft·°F) |
| 25 cal(IT)/(cm·s·°C) | 6047.72 BTU/(h·ft·°F) |
| 50 cal(IT)/(cm·s·°C) | 12095.4 BTU/(h·ft·°F) |
| 100 cal(IT)/(cm·s·°C) | 24190.9 BTU/(h·ft·°F) |