How to Convert W/m² to BTU/(h·ft²)
To convert w/m² to btu/(h·ft²), divide the value by 3.1546.
The Formula
BTU/(h·ft²) = W/m² ÷ 3.1546
Key Fact
1 btu per hour-square foot = 3.1546 w/m²
Tip: To convert btu/(h·ft²) back to w/m², multiply by 3.1546.
W/m² to BTU/(h·ft²)
Convert w/m² (W/m²) to btu/(h·ft²) (BTU/(h·ft²)) with formulas, examples, and conversion tables.
W/m²
BTU/(h·ft²)
1 W/m² = 0.317 BTU/(h·ft²)
Full precision:0.31699841 BTU/(h·ft²)
Step-by-Step Solution
To convert 1 w/m² to btu/(h·ft²), we divide by 3.1546 because one btu per hour-square foot equals exactly 3.1546 w/m².
1 btu per hour-square foot = 3.1546 w/m²
Since there are 3.1546 w/m² in every btu per hour-square foot, we divide our value by this factor:
1 ÷ 3.1546 = 0.317 btu/(h·ft²)
So 1 w/m² = 0.317 btu/(h·ft²).
Quick check: 0.317 × 3.1546 = 1 w/m²
Example Conversions
Example 1: 1 W/m² = 0.317 BTU/(h·ft²)
1 ÷ 3.1546 = 0.317
1 ÷ 3.1546 = 0.317
Example 2: 5 W/m² = 1.585 BTU/(h·ft²)
5 ÷ 3.1546 = 1.585
5 ÷ 3.1546 = 1.585
Example 3: 10 W/m² = 3.17 BTU/(h·ft²)
10 ÷ 3.1546 = 3.17
10 ÷ 3.1546 = 3.17
W/m² to BTU/(h·ft²) Table
| W/m² | BTU/(h·ft²) |
|---|---|
| 1 W/m² | 0.317 BTU/(h·ft²) |
| 2 W/m² | 0.634 BTU/(h·ft²) |
| 5 W/m² | 1.585 BTU/(h·ft²) |
| 10 W/m² | 3.17 BTU/(h·ft²) |
| 20 W/m² | 6.34 BTU/(h·ft²) |
| 25 W/m² | 7.925 BTU/(h·ft²) |
| 50 W/m² | 15.8499 BTU/(h·ft²) |
| 100 W/m² | 31.6998 BTU/(h·ft²) |
| 250 W/m² | 79.2496 BTU/(h·ft²) |
| 500 W/m² | 158.499 BTU/(h·ft²) |
| 1000 W/m² | 316.998 BTU/(h·ft²) |
1 Watt per Square Meter in Other Units
| Unit | 1 W/m² = |
|---|---|
| W/m² to kW/m² | 0.001 kW/m² |
| W/m² to W/cm² | 0.0001 W/cm² |
| W/m² to BTU/(h·ft²) | 0.316998 BTU/(h·ft²) |
| W/m² to BTU/(s·ft²) | 0.000088 BTU/(s·ft²) |
| W/m² to cal/(h·cm²) | 0.085985 cal/(h·cm²) |
| W/m² to cal/(s·cm²) | 0.000024 cal/(s·cm²) |