Convert watt/square meter to btu (it)/hour/square foot
Watt/Square Meter
The watt per square metre (W/m²) is the SI unit of heat flux density and irradiance. It represents the power transmitted per unit area. The solar constant (total solar irradiance) at Earth's orbit is approximately 1361 W/m². Used in heat transfer engineering, solar energy, and thermal radiation analysis.
Btu (IT)/Hour/Square Foot
The British thermal unit (IT) per hour per square foot (Btu/(h·ft²)) equals approximately 3.155 W/m² and is the most common imperial unit of heat flux in North American HVAC and building engineering. It is used for heat loss calculations, U-values, and thermal performance ratings of building envelopes.
Watt/Square Meter to Btu (IT)/Hour/Square Foot conversion table
| Watt/Square Meter | Btu (IT)/Hour/Square Foot |
|---|---|
| 1 | 0.316998 |
| 2 | 0.633997 |
| 5 | 1.58499 |
| 10 | 3.16998 |
| 25 | 7.92496 |
| 50 | 15.8499 |
| 100 | 31.6998 |
| 500 | 158.499 |
| 1000 | 316.998 |