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U-factor (W/m²·K) to U-factor (BTU/h·ft²·°F)

Convert U-factor (W/m²·K) to U-factor (BTU/h·ft²·°F), with the math shown step by step.

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BTU per hour-square foot-degree Fahrenheit
0.21 BTU/(h·ft²·°F)

1.2 W/(m²·K) = 0.21 BTU/(h·ft²·°F)

Also equals

How it works

BTU/(h·ft²·°F) = W/(m²·K) ÷ 5.67826334

One BTU per hour-square foot-degree Fahrenheit is about 5.67826334 watts per square meter-kelvin, so dividing by 5.67826334 turns watts per square meter-kelvin into BTU per hour-square foot-degree Fahrenheit. For example, 1.4 W/(m²·K) is about 0.2466 BTU/(h·ft²·°F).

  1. Divide by 5.67826334 1.2 ÷ 5.67826334 = 0.21 BTU/(h·ft²·°F)

Nearby values

Watts per square meter-kelvin BTU per hour-square foot-degree Fahrenheit R-value (US) Kilocalories per hour-square meter-degree Celsius
0.9 W/(m²·K) 0.16 BTU/(h·ft²·°F) 6.31 0.77
1 W/(m²·K) 0.18 BTU/(h·ft²·°F) 5.68 0.86
1.1 W/(m²·K) 0.19 BTU/(h·ft²·°F) 5.16 0.95
1.2 W/(m²·K) 0.21 BTU/(h·ft²·°F) 4.73 1.03
1.3 W/(m²·K) 0.23 BTU/(h·ft²·°F) 4.37 1.12
1.4 W/(m²·K) 0.25 BTU/(h·ft²·°F) 4.06 1.2
1.5 W/(m²·K) 0.26 BTU/(h·ft²·°F) 3.79 1.29

Printed from rocketcalc.io/heat-transfer/metric-u-value-to-us-u-factor/1.2