Heat flux density

Metric System (SI)

Watt per square meter - W/m2

Kilowatt per square meter - kW/m2

Watt per squar centimeter - W/cm2

Kilowatt per square centimeter - kW/cm2

Joule per second per square meter - J/(s·m2)

US and British Imperial units

BTU (international) per second per square foot - BTU(IT)/(s·ft2)

BTU (international) per minute per square foot - BTU(IT)/(min·ft2)

BTU (international) per hour per square foot - BTU(IT)/(hr·ft2)

BTU (thermochemical) per second per square inch - BTU(th)/(s·in2)

BTU (thermochemical) per second per square foot - BTU(th)/(s·ft2)

BTU (thermochemical) per minute per square foot - BTU(th)/(min·ft2)

BTU (thermochemical) per hour per square foot - BTU(th)/(hr·ft2)

Celsius heat unit per hour per square foot - CHU/(hr·ft2)

Watt per square inch - W/in2

Foot-pounds per minute per square foot - ft·lb/(min·ft2)

Common Units

Horsepower (metric) force per square foot - hp(M)/ft2

Horsepower (mechanical) force per square foot - hp(I)/ft2

Horsepower (electric) force per square foot - hp(E)/ft2

Horsepower (boiler) per square foot - hp(S)/ft2

kilocalorie (international) per hour per square meter - kcal(IT)/(h·m2)

kilocalorie (international) per hour per square foot - kcal(IT)/(h·ft2)

calorie (international) per minute per square centimeter - cal(IT)/(min·cm2)

calorie (international) per hour per square centimeter - cal(IT)/(hr·cm2)

Calorie (thermochemical) per minute per square centimeter - cal(th)/(min·cm2)

calorie (thermochemical) per hour per square centimeter - cal(th)/(hr·cm2)

Centimetre–gram–second system of units(CGS)

Erg per hour per square millimeter - erg/(hr·mm2)

Dyne-centimeter per hour per square centimeter - dyn/(hr·cm2)