Convert BTU per hour per foot per degree Fahrenheit to Thermochemical calorie per centimetre per second per degree Celsius

Convert BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) to Thermochemical calorie per centimetre per second per degree Celsius (cal(th)/(cm·s·°C)) instantly and accurately.

From: BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F))

To: Thermochemical calorie per centimetre per second per degree Celsius (cal(th)/(cm·s·°C))

Conversion Formula

cal(th)/(cm·s·°C) = BTU/(h·ft·°F) × 0.00413655513

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 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).

Quick Reference Table

BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F))	Thermochemical calorie per centimetre per second per degree Celsius (cal(th)/(cm·s·°C))
1 BTU/(h·ft·°F)	0.00413656 cal(th)/(cm·s·°C)
2 BTU/(h·ft·°F)	0.00827311 cal(th)/(cm·s·°C)
5 BTU/(h·ft·°F)	0.0206828 cal(th)/(cm·s·°C)
10 BTU/(h·ft·°F)	0.0413656 cal(th)/(cm·s·°C)
25 BTU/(h·ft·°F)	0.103414 cal(th)/(cm·s·°C)
50 BTU/(h·ft·°F)	0.206828 cal(th)/(cm·s·°C)
100 BTU/(h·ft·°F)	0.413656 cal(th)/(cm·s·°C)

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