Physics > Thermal Units and Equivalents
Thermal conductance (total)
| Unit Name |
Symbol |
SI Equivalent |
|
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 |
1x10-6 /K |
|
/°C |
1 /K |
|
/°F |
1.8 /K |
|
/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 |
|
cal (IT)/g |
4186.74 J/kg |
| calorie (therm.) per gram |
|
cal (therm.)/g |
4184 J/kg |
|
J/g |
1000 J/kg |
|
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 |
1x10 4 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 |