Heat Flux Density Converter

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Heat • 6 units

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How to Use the Heat Flux Density Converter

Enter a value — type any number. Invalid text and symbols are blocked automatically.
Select From and To units — choose the units to convert between.
Read the animated result — the converted value, factor, and full reference table update instantly.
Use Swap (⇄) — reverse the conversion in one click.

Why Use This Heat Flux Density Converter

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Accurate Standards

Built on internationally recognised SI and standards-body conversion factors for dependable results.

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Instant & Animated

Results update live as you type, with a clear visual breakdown across every unit at once.

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100% Private

Everything runs in your browser — no account, no uploads, nothing leaves your device.

Common Heat Flux Density Converter Values

Quick reference — 1 Watt/meter² (W/m²) is equal to:

Kilowatt/meter²	kW/m²	0.001
Watt/centimeter²	W/cm²	0.0001
Calorie/(s·cm²)	cal/(s·cm²)	0.0000239006
BTU/(h·ft²)	BTU/(h·ft²)	0.316998305
Kilocalorie/(h·m²)	kcal/(h·m²)	0.859845228

Heat Flux Density Converter FAQ

What is heat flux density? ▾

It is the rate of heat energy transfer per unit area, measured in watts per square metre (W/m²). Solar irradiance at Earth's surface peaks around 1,000 W/m².