Convert BTU per hour per foot per degree Fahrenheit to International table calorie per centimetre per second per degree Celsius
Convert BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) to International table calorie per centimetre per second per degree Celsius (cal(IT)/(cm·s·°C)) instantly and accurately.
Conversion Formula
cal(IT)/(cm·s·°C) = BTU/(h·ft·°F) × 0.004133788732
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).
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).
Quick Reference Table
| BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) | International table calorie per centimetre per second per degree Celsius (cal(IT)/(cm·s·°C)) |
|---|---|
| 1 BTU/(h·ft·°F) | 0.00413379 cal(IT)/(cm·s·°C) |
| 2 BTU/(h·ft·°F) | 0.00826758 cal(IT)/(cm·s·°C) |
| 5 BTU/(h·ft·°F) | 0.0206689 cal(IT)/(cm·s·°C) |
| 10 BTU/(h·ft·°F) | 0.0413379 cal(IT)/(cm·s·°C) |
| 25 BTU/(h·ft·°F) | 0.103345 cal(IT)/(cm·s·°C) |
| 50 BTU/(h·ft·°F) | 0.206689 cal(IT)/(cm·s·°C) |
| 100 BTU/(h·ft·°F) | 0.413379 cal(IT)/(cm·s·°C) |