Convert International table calorie per centimetre per second per degree Celsius to BTU inch per hour per square foot per degree Fahrenheit
Convert International table calorie per centimetre per second per degree Celsius (cal(IT)/(cm·s·°C)) to BTU inch per hour per square foot per degree Fahrenheit (BTU·in/(h·ft²·°F)) instantly and accurately.
Conversion Formula
BTU·in/(h·ft²·°F) = cal(IT)/(cm·s·°C) × 2902.905973
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 inch per hour per square foot per degree Fahrenheit
The BTU·in/(h·ft²·°F) equals (1055.05585262 × 0.0254 × 9)/(3600 × 0.09290304 × 5) W/(m·K) ≈0.1442 W/(m·K). The standard US k-factor unit for insulation per ASTM C177, C335, and C518. Mineral wool ≈0.25; expanded polystyrene ≈0.24; polyurethane foam ≈0.14 BTU·in/(h·ft²·°F). 1 BTU·in/(h·ft²·°F) ≈0.1442 W/(m·K).
Quick Reference Table
| International table calorie per centimetre per second per degree Celsius (cal(IT)/(cm·s·°C)) | BTU inch per hour per square foot per degree Fahrenheit (BTU·in/(h·ft²·°F)) |
|---|---|
| 1 cal(IT)/(cm·s·°C) | 2902.91 BTU·in/(h·ft²·°F) |
| 2 cal(IT)/(cm·s·°C) | 5805.81 BTU·in/(h·ft²·°F) |
| 5 cal(IT)/(cm·s·°C) | 14514.5 BTU·in/(h·ft²·°F) |
| 10 cal(IT)/(cm·s·°C) | 29029.1 BTU·in/(h·ft²·°F) |
| 25 cal(IT)/(cm·s·°C) | 72572.6 BTU·in/(h·ft²·°F) |
| 50 cal(IT)/(cm·s·°C) | 145145 BTU·in/(h·ft²·°F) |
| 100 cal(IT)/(cm·s·°C) | 290291 BTU·in/(h·ft²·°F) |