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List Units: A B C D E-F G H-I J-L M N O-P Q-R S T U-Z
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Thermal conductance (total)
Unit Name Symbol SI Equivalent 
· watt per kelvin 
W/K  1 W/K 
Thermal conductivity
Unit Name Symbol SI Equivalent 
· British thermal unit (IT) per foot per hour per Fahrenheit degree 
Btu (IT)/ft-h-°F  1.73073 W/m-K 
· British thermal unit (IT)-inch per square foot per hour per Fahrenheit degree 
Btu (IT)-in/h-ft2-°F  0.144228 W/m-K 
· British thermal unit (IT)-inch per square foot per second per Fahrenheit degree 
Btu (IT)-in/s-ft2-°F  519.22 W/m-K 
· British thermal unit (therm.) per foot per hour per Fahrenheit degree 
Btu (therm.)/ft-h-°F  1.72958 W/m-K 
· British thermal unit (therm.)-inch per square foot per hour per Fahrenheit degree 
Btu (therm.)-in/h-ft2-°F  0.144131 W/m-K 
· British thermal unit (therm.)-inch per square foot per second per Fahrenheit degree 
Btu (therm.)-in/s-ft2-°F  518.873 W/m-K 
· calorie (IT) per centimeter per second per degree Celsius 
cal (IT)/cm-s-°C  418.673 W/m-K 
· calorie (therm.) per centimeter per second per degree Celsius 
cal (therm.)/cm-s-°C  418.4 W/m-K 
· watt per centimeter per celsius degree 
W/cm-°C  100 W/m-K 
· watt per meter per Celsius degree 
W/m-°C  1 W/m-K 
· watt per meter per kelvin 
W/m-K  1 W/m-K 
Thermal expansion coefficient
Unit Name Symbol SI Equivalent 
· microinch per inch per Fahrenheit degree 
µin/in-°F  1.8x10-6 /K 
· micron per meter per Celsius degree 
µm/m-°C  10x10-7 /K 
· per Celsius degree 
/°C  1 /K 
· per Fahrenheit degree 
/°F  1.8 /K 
· per Kelvin 
/K  1 /K 
Thermal heat capacity
Unit Name Symbol SI Equivalent 
· British thermal unit (IT) per pound mass 
Btu (IT)/lbm  2326 J/kg 
· British thermal unit (therm.) per pound mass 
Btu (therm.)/lbm  2324.44 J/kg 
· calorie (IT) per gram 
cal (IT)/g  4186.74 J/kg 
· calorie (therm.) per gram 
cal (therm.)/g  4184 J/kg 
· joule per gram 
J/g  1000 J/kg 
· joule per kilogram 
J/kg  1 J/kg 
· kilocalorie (IT) per kilogram 
Cal (IT)/kg, kcal/kg  4186.74 J/kg 
· kilowatt-hour per kilogram 
kWh/kg  3.6x106 J/kg 
Thermal heat transfer coefficient
Unit Name Symbol SI Equivalent 
· British thermal unit (IT) per square foot per hour per Fahrenheit degree 
Btu (IT)/h-ft2-°F  5.67826 W/m2-K 
· British thermal unit (therm.) per square foot per hour per Fahrenheit degree 
Btu (therm.)/h-ft2-°F  5.67446 W/m2-K 
· watt per square centimeter per kelvin 
W/cm2-K  1x104 W/m2-K 
· watt per square meter per degree celcius 
W/m2-°C  1 W/m2-K 
· watt per square meter per kelvin 
W/m2-K  1 W/m2-K 
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