Convert Watts per Square Meter to BTU per Hour Square Foot
1 watt per square meter = 0.31699833 btu per hour square foot. Multiply the number of watts per square meter by 0.316998330628.
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
Watts per Square Meter to BTU per Hour Square Foot table
| Watts per Square Meter | BTU per Hour Square Foot |
|---|---|
| 1 W/m² | 0.31699833 BTU/(h·ft²) |
| 2 W/m² | 0.63399666 BTU/(h·ft²) |
| 3 W/m² | 0.95099499 BTU/(h·ft²) |
| 4 W/m² | 1.2679933 BTU/(h·ft²) |
| 5 W/m² | 1.5849917 BTU/(h·ft²) |
| 10 W/m² | 3.1699833 BTU/(h·ft²) |
| 20 W/m² | 6.3399666 BTU/(h·ft²) |
| 25 W/m² | 7.9249583 BTU/(h·ft²) |
| 50 W/m² | 15.849917 BTU/(h·ft²) |
| 100 W/m² | 31.699833 BTU/(h·ft²) |
| 500 W/m² | 158.49917 BTU/(h·ft²) |
| 1000 W/m² | 316.99833 BTU/(h·ft²) |
About these units
The watt per square meter (W/m²) is an SI base or derived unit of heat flux density.
The btu per hour square foot (BTU/(h·ft²)) is an imperial unit of heat flux density, equal to 3.1545907 watts per square meter.
Going the other way, 1 btu per hour square foot = 3.1545907 watts per square meter. 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.
Frequently asked
- How many btu per hour square foot are in a watt per square meter?
- 1 watt per square meter = 0.31699833 btu per hour square foot.
- How do you convert watts per square meter to btu per hour square foot?
- Multiply the number of watts per square meter by 0.316998330628.
- What is 10 W/m² in BTU/(h·ft²)?
- 10 W/m² = 3.1699833 BTU/(h·ft²).