Heat Flux Density / Btu IT/(h·ft²) → W/m²
Convert Btu IT per hour square foot to Watts per square meter
Convert heat-transfer power per unit area. Convert Btu IT per hour square foot (Btu IT/(h·ft²)) to Watts per square meter (W/m²). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Watts per square meter to Btu IT per hour square foot →
How to convert Btu IT per hour square foot to watts per square meter
Heat flux density is power per area, W/m². A positive or negative sign can indicate direction under the chosen sign convention; this tool preserves that sign.
Use x for the value in Btu IT/(h·ft²), b for the intermediate value in W/m², and y for the result in W/m².
W/m² = Btu IT/(h·ft²) × 3.1545907450630484
Worked examples
10 Btu IT/(h·ft²) ≈ 31.5459074506 W/m²
Step 1: (10 × 3.15459074506) ≈ 31.5459074506 W/m².
Step 2: 31.5459074506 ÷ 1 ≈ 31.5459074506 W/m².20 Btu IT/(h·ft²) ≈ 63.0918149013 W/m²
Step 1: (20 × 3.15459074506) ≈ 63.0918149013 W/m².
Step 2: 63.0918149013 ÷ 1 ≈ 63.0918149013 W/m².
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Btu IT per hour square foot
Btu IT per hour square foot (Btu IT/(h·ft²)) measures heat flux density under the conventions above. The base value in W/m² is (x × 3.15459074506), where x is the numerical value in Btu IT/(h·ft²). Factors shown here are rounded for display; calculations use the stored factor.
About Watts per square meter
Watts per square meter (W/m²) measures heat flux density under the conventions above. The base value in W/m² is (x × 1), where x is the numerical value in W/m². Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Btu IT per hour square foot to watts per square meter reference table
| Btu IT per hour square foot (Btu IT/(h·ft²)) | Watts per square meter (W/m²) |
|---|---|
| 1 | 3.15459074506 |
| 5 | 15.7729537253 |
| 10 | 31.5459074506 |
| 25 | 78.8647686266 |
| 50 | 157.729537253 |
| 100 | 315.459074506 |
| 1000 | 3154.59074506 |
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