Heat Flux Density Converter
Convert heat flux density, the rate of heat energy transfer per unit area.
Written by Rahman · Last reviewed
Quick answer
Heat flux density is the rate of heat transfer per unit area, in watts per square metre. One kilowatt per square metre is 1,000, one watt per square centimetre is 10,000 and one BTU per hour per square foot is 3.1546. Solar irradiance at the top of the atmosphere is about 1,361 W/m².
| Watt per square metre (W/m²) | 1 |
| Kilowatt per square metre (kW/m²) | 0.001 |
| Watt per square centimetre (W/cm²) | 0.0001 |
| Calorie per s·cm² (cal/(s·cm²)) | 0.00002388458966 |
| BTU per h·ft² (BTU/(h·ft²)) | 0.3169983306 |
About the Heat Flux Density Converter
Heat flux density is the rate of heat energy transfer through a unit of area: power per square metre. The SI unit is the watt per square metre.
It is central to studies of insulation, solar radiation and heat exchanger performance.
Frequently Asked Questions
What is heat flux density?
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It is the rate at which heat energy flows through a given area, measured in watts per square metre.
How is it different from heat density?
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Heat density is energy per area, while heat flux density is power (energy per second) per area.
Where is it used?
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It is used in insulation analysis, solar panel ratings and heat exchanger design.