BTU per hour square foot to watt per square meter converter

Convert BTU per hour square foot to watt per square meter in the Heat flux family. See a sample calculation, unit definitions, and the interactive converter.

Example conversion: 1 Btu-h-ft2

3.15459075 watt per square meter

This example is calculated from the same unit registry used by the interactive converter.

Formula and unit definitions

Convert heat-transfer rate per unit area.

target value = source value × source factor ÷ target factor

Source unit: BTU per hour square foot (Btu-h-ft2), factor 3.15459075, offset 0.

Target unit: watt per square meter (W-m2), factor 1, offset 0.

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Important note

The calculation is performed locally from the listed unit definitions. Display results are rounded for readability; high-precision and regulated work should use the governing standard and appropriate significant figures.

For high-precision, regulated or safety-critical use, check the underlying standard and its required precision. Historical and approximate units are identified in their names or family descriptions.

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