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Watts per square meter to BTU per hour-square foot

Convert watts per square meter to BTU per hour-square foot, with the math shown step by step.

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BTU per hour-square foot
126.6 BTU/(h·ft²)

399.37 W/m² = 126.6 BTU/(h·ft²)

Also equals

How it works

BTU/(h·ft²) = W/m² ÷ 3.15459075

One BTU per hour-square foot is about 3.15459075 watts per square meter, so dividing by 3.15459075 turns watts per square meter into BTU per hour-square foot. For example, 1,000 W/m² is about 317 BTU/(h·ft²).

  1. Divide by 3.15459075 399.37 ÷ 3.15459075 = 126.6 BTU/(h·ft²)

Nearby values

Watts per square meter BTU per hour-square foot Kilocalories per hour-square meter Kilowatts per square meter
99.37 W/m² 31.5 BTU/(h·ft²) 85.5 0.1
199.37 W/m² 63.2 BTU/(h·ft²) 171.54 0.2
299.37 W/m² 94.9 BTU/(h·ft²) 257.58 0.3
399.37 W/m² 126.6 BTU/(h·ft²) 343.63 0.4
499.37 W/m² 158.3 BTU/(h·ft²) 429.67 0.5
599.37 W/m² 190 BTU/(h·ft²) 515.71 0.6
699.37 W/m² 221.7 BTU/(h·ft²) 601.75 0.7

Printed from rocketcalc.io/heat-flux/w-per-m2-to-btu-per-h-ft2/399.37