THERMAL
Heat flux
Heat-transfer rate per surface area.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result0.316998 BtuIT/(h·ft²)1 W/m² = 0.316998 BtuIT/(h·ft²)
EVERYDAY · ENGINEERING · SCIENCE
W/m² to BtuIT/(h·ft²) Converter
Convert watt per square metre (W/m²) to Btu per hour square foot (BtuIT/(h·ft²)). Enter a value for an instant result, or use the examples and reverse conversion below.
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HOW IT IS CALCULATED
Convert through watt per square metre
Enter a watt per square metre value to calculate Btu per hour square foot with full internal precision before display rounding.
Display PrecisionAuto · 6 significant digits
Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| watt per square metrefrom W/m² | W/m² | 1 |
| kilowatt per square metrefrom W/m² | kW/m² | 0.001 |
| watt per square centimetrefrom W/m² | W/cm² | 0.0001 |
| Btu per hour square footfrom W/m² | BtuIT/(h·ft²) | 0.316998 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
W/m² to BtuIT/(h·ft²) Conversion Reference
Watt Per Square Metre (W/m²) and Btu per hour square foot (BtuIT/(h·ft²)) are units of heat flux. Use this page to convert in either direction.
Conversion Examples
| Watt Per Square Metre (W/m²) | Btu Per Hour Square Foot (BtuIT/(h·ft²)) |
|---|---|
| 1 W/m² | 0.316998 BtuIT/(h·ft²) |
| 5 W/m² | 1.58499 BtuIT/(h·ft²) |
| 10 W/m² | 3.16998 BtuIT/(h·ft²) |
| 100 W/m² | 31.6998 BtuIT/(h·ft²) |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
BtuIT/(h·ft²) to W/m² (Btu per hour square foot to watt per square metre)