Unit Conversion Heat Flux Density Converter Value Prefix yotta zetta exa peta tera giga mega kilo hekto deka deci centi milli micro nano pico femto atto zepto yocto metric watt/square meter {W/m²} watt/square centimeter {W/cm²} calorie (th)/m² hour {cal/m²h} calorie (IT)/m² hour {cal/m²h} Imperial/US Btu (th)/foot²hour {Btu/ft²h} Btu (IT)/foot²hour {Btu/ft²h} Btu (th)/foot²second {Btu/ft²s} Btu (IT)/foot²second {Btu/ft²s} =.... yotta zetta exa peta tera giga mega kilo hekto deka deci centi milli micro nano pico femto atto zepto yocto metric watt/square meter {W/m²} watt/square centimeter {W/cm²} calorie (th)/m² hour {cal/m²h} calorie (IT)/m² hour {cal/m²h} Imperial/US Btu (th)/foot²hour {Btu/ft²h} Btu (IT)/foot²hour {Btu/ft²h} Btu (th)/foot²second {Btu/ft²s} Btu (IT)/foot²second {Btu/ft²s} Basic unit dimensions : [mass][time]-3 Length, Area and Volume Units Force, Weight and Mass Units Pressure, Energy, Power Units Viscosity Units Temperature Units Velocity and Flow Units Heat Units Thermal Conductivity Conversion Heat Transfer Coefficient Conv. Specific Heat Capacity Conversion Heat Flux Density Conversion Light Units Electricity Units Other