watt per square meter
| Symbol: | W/m2 |
| Category: | Energy flux |
| SI Equivalent: | 1 W/m2 |
| Dimension: | MT-3 |
| System: | SI |
| Notes | |
| Unit for energy flux, irradiance, or radiant flux received | |
1 W/m2 =
| Energy flux | ||
| Symbol | Unit Name | |
| 0.316998 | Btu (IT)/h-ft2 | British thermal unit (IT) per hour per square foot |
| 0.317211 | Btu (therm.)/h-ft2 | British thermal unit (therm.) per hour per square foot |
| 1.43369×10-3 | ly | langley (flux) |















