Convert Thermochemical calorie per centimetre per second per degree Celsius to BTU inch per hour per square foot per degree Fahrenheit
Convert Thermochemical calorie per centimetre per second per degree Celsius (cal(th)/(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(th)/(cm·s·°C) × 2900.9646
About Thermochemical calorie per centimetre per second per degree Celsius
The cal(th)/(cm·s·°C) equals exactly 4.184/0.01 = 418.4 W/(m·K) (1 thermochemical calorie = 4.184 J). The CGS thermal conductivity unit dominant in US physics and chemistry before SI adoption. Copper: ≈0.921; aluminium: ≈0.489 cal(th)/(cm·s·°C). Not equal to cal(IT)/(cm·s·°C). 1 cal(th)/(cm·s·°C) = 418.4 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
| Thermochemical calorie per centimetre per second per degree Celsius (cal(th)/(cm·s·°C)) | BTU inch per hour per square foot per degree Fahrenheit (BTU·in/(h·ft²·°F)) |
|---|---|
| 1 cal(th)/(cm·s·°C) | 2900.96 BTU·in/(h·ft²·°F) |
| 2 cal(th)/(cm·s·°C) | 5801.93 BTU·in/(h·ft²·°F) |
| 5 cal(th)/(cm·s·°C) | 14504.8 BTU·in/(h·ft²·°F) |
| 10 cal(th)/(cm·s·°C) | 29009.6 BTU·in/(h·ft²·°F) |
| 25 cal(th)/(cm·s·°C) | 72524.1 BTU·in/(h·ft²·°F) |
| 50 cal(th)/(cm·s·°C) | 145048 BTU·in/(h·ft²·°F) |
| 100 cal(th)/(cm·s·°C) | 290096 BTU·in/(h·ft²·°F) |