Heat Flux Density converter
The rate of heat flow through a surface, solar irradiance, furnace walls and electronics cooling all use it.
Converter
Quick pairs
tap to loadOne watt per square meter in every heat flux density unit
6 rows| Unit | Symbol | 1 W/m² equals |
|---|---|---|
| Kilowatt per square meter | kW/m² | 0.001 |
| Watt per square centimeter | W/cm² | 0.0001 |
| Calorie per second per square centimeter | cal/(s·cm²) | 2.390057361e-5 |
| Kilocalorie per hour per square meter | kcal/(h·m²) | 0.8604206501 |
| BTU per hour per square foot | BTU/(h·ft²) | 0.3169983306 |
| Langley per minute | Ly/min | 0.001434034417 |
How the watt per square meter to btu per hour per square foot conversion works
Multiply by 0.3169983306 to go from watt per square meter to btu per hour per square foot:
BTU/(h·ft²) = W/m² × 0.3169983306
Going the other way, multiply by 3.154590745, which is the same as dividing by 0.3169983306.
Questions
How many btu per hour per square foot are in one watt per square meter?
One watt per square meter equals 0.3169983306 btu per hour per square foot.
Which units does this heat flux density converter cover?
7 units in total, all referenced to the watt per square meter. They include watt per square meter, kilowatt per square meter, watt per square centimeter, calorie per second per square centimeter, kilocalorie per hour per square meter, btu per hour per square foot and more. Pick any pair from the two dropdown lists.
How precise are the results?
Every conversion is computed in your browser at double precision from the factors listed on this page, which follow the SI definitions and the exact international agreements for imperial and US customary units. Use the Decimals control to round the display without changing the underlying value.
Does anything I type leave my device?
No. The converter is plain JavaScript running locally, with no server round-trip, and the page keeps working offline once loaded.