Convert IT BTU per Hour Square Foot to Watt per Square Meter
Live bidirectional calculator for IT BTUs per Hour Square Foot (Btu_IT/(h·ft²)) and Watts per Square Meter (W/m²) with verified formula and conversion charts.
Heat Flux Density9 units
How the Calculation Works (Linear Scaling)
Since 1 IT BTU per Hour Square Foot = 3.154591 Watts per Square Meter, multiply the value in IT BTUs per Hour Square Foot by 3.154591.
IT BTU per Hour Square Foot to Watt per Square Meter Conversion Table
Precomputed values for quick reference and printing.
| IT BTU per Hour Square Foot | Watt per Square Meter |
|---|---|
| 1 Btu_IT/(h·ft²) | 3.1546 W/m² |
| 2 Btu_IT/(h·ft²) | 6.3092 W/m² |
| 3 Btu_IT/(h·ft²) | 9.4638 W/m² |
| 4 Btu_IT/(h·ft²) | 12.6184 W/m² |
| 5 Btu_IT/(h·ft²) | 15.773 W/m² |
| 6 Btu_IT/(h·ft²) | 18.9275 W/m² |
| 7 Btu_IT/(h·ft²) | 22.0821 W/m² |
| 8 Btu_IT/(h·ft²) | 25.2367 W/m² |
| 9 Btu_IT/(h·ft²) | 28.3913 W/m² |
| 10 Btu_IT/(h·ft²) | 31.5459 W/m² |
| 15 Btu_IT/(h·ft²) | 47.3189 W/m² |
| 20 Btu_IT/(h·ft²) | 63.0918 W/m² |
| 25 Btu_IT/(h·ft²) | 78.8648 W/m² |
| 30 Btu_IT/(h·ft²) | 94.6377 W/m² |
| 40 Btu_IT/(h·ft²) | 126.1836 W/m² |
| 50 Btu_IT/(h·ft²) | 157.7295 W/m² |
| 75 Btu_IT/(h·ft²) | 236.5943 W/m² |
| 100 Btu_IT/(h·ft²) | 315.4591 W/m² |
| Watt per Square Meter | IT BTU per Hour Square Foot |
|---|---|
| 1 W/m² | 0.317 Btu_IT/(h·ft²) |
| 2 W/m² | 0.634 Btu_IT/(h·ft²) |
| 3 W/m² | 0.951 Btu_IT/(h·ft²) |
| 4 W/m² | 1.268 Btu_IT/(h·ft²) |
| 5 W/m² | 1.585 Btu_IT/(h·ft²) |
| 6 W/m² | 1.902 Btu_IT/(h·ft²) |
| 7 W/m² | 2.219 Btu_IT/(h·ft²) |
| 8 W/m² | 2.536 Btu_IT/(h·ft²) |
| 9 W/m² | 2.853 Btu_IT/(h·ft²) |
| 10 W/m² | 3.17 Btu_IT/(h·ft²) |
| 15 W/m² | 4.755 Btu_IT/(h·ft²) |
| 20 W/m² | 6.34 Btu_IT/(h·ft²) |
| 25 W/m² | 7.925 Btu_IT/(h·ft²) |
| 30 W/m² | 9.5099 Btu_IT/(h·ft²) |
| 40 W/m² | 12.6799 Btu_IT/(h·ft²) |
| 50 W/m² | 15.8499 Btu_IT/(h·ft²) |
| 75 W/m² | 23.7749 Btu_IT/(h·ft²) |
| 100 W/m² | 31.6998 Btu_IT/(h·ft²) |
About IT BTU per Hour Square Foot (Btu_IT/(h·ft²))
The standard US customary unit of heat flux density, equal to approximately 3.154591 W/m².
History: Codified by ASHRAE for building envelope heat flux, solar gain, and radiant heating panels.
Common Uses: ASHRAE solar heat gain coefficient (SHGC) tables, boiler heat release rates, radiant floor heating.
About Watt per Square Meter (W/m²)
The SI unit of heat flux density (q"), defined as 1 watt of thermal power transmitted through 1 square meter of surface area (1 W/m² = 1 J/(s·m²)).
History: Standardized in SI for radiative and convective heat flux density and irradiance (solar constant ≈ 1361 W/m²).
Common Uses: Solar irradiance measurements, building heat loss rate, industrial furnace radiant flux.
❓ Frequently Asked Questions
How many Watts per Square Meter are in 1 IT BTU per Hour Square Foot?
There are exactly 3.154591 Watts per Square Meter in 1 IT BTU per Hour Square Foot (1 Btu_IT/(h·ft²) = 3.154591 W/m²).
What is the formula to convert IT BTU per Hour Square Foot to Watt per Square Meter?
The formula is: Watt per Square Meter = IT BTU per Hour Square Foot × 3.154591. Since 1 IT BTU per Hour Square Foot = 3.154591 Watts per Square Meter, multiply the value in IT BTUs per Hour Square Foot by 3.154591.
How do I convert 1 Btu_IT/(h·ft²) to W/m² manually?
To convert 1 Btu_IT/(h·ft²) to W/m²: apply the formula Watt per Square Meter = IT BTU per Hour Square Foot × 3.154591. Substituting gives: 1 × 3.154591 = 3.1546 W/m².