Skip to content

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.

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

20.88 W/(m²·K) = 3.68 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 20.88 ÷ 5.67826334 = 3.68 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
20.58 W/(m²·K) 3.62 BTU/(h·ft²·°F) 0.28 17.71
20.68 W/(m²·K) 3.64 BTU/(h·ft²·°F) 0.27 17.79
20.78 W/(m²·K) 3.66 BTU/(h·ft²·°F) 0.27 17.88
20.88 W/(m²·K) 3.68 BTU/(h·ft²·°F) 0.27 17.97
20.98 W/(m²·K) 3.69 BTU/(h·ft²·°F) 0.27 18.05
21.08 W/(m²·K) 3.71 BTU/(h·ft²·°F) 0.27 18.14
21.18 W/(m²·K) 3.73 BTU/(h·ft²·°F) 0.27 18.22

Printed from rocketcalc.io/heat-transfer/metric-u-value-to-us-u-factor/20.88