Heat Flux Density converter
W/m², BTU/(h·ft²) and kW/m² for heat and solar load.
Heat flux density is power per unit area: the heat escaping through a wall, the output of a radiant panel, or sunlight on a roof, which peaks near 1,000 W/m². Building services engineers switch between W/m² and BTU/(h·ft²) constantly.
Result
1 W/m² = 0.3169983306 BTU/(h·ft²)
Multiply the number of watts per square meter by 0.316998330628.
Results are rounded for display. Double-check values for critical work.
Popular heat flux density conversions
All heat flux density units
Watt per Square MeterW/m²
Kilowatt per Square MeterkW/m²
BTU per Hour Square FootBTU/(h·ft²)
Watt per Square CentimeterW/cm²
Watt per Square InchW/in²
Kilocalorie per Hour Square Meterkcal/(h·m²)
Calorie per Second Square Centimetercal/(s·cm²)