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
0.17 BTU/(h·ft²·°F)

0.99 W/(m²·K) = 0.17 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 0.99 ÷ 5.67826334 = 0.17 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
0.69 W/(m²·K) 0.12 BTU/(h·ft²·°F) 8.23 0.59
0.79 W/(m²·K) 0.14 BTU/(h·ft²·°F) 7.19 0.68
0.89 W/(m²·K) 0.16 BTU/(h·ft²·°F) 6.38 0.77
0.99 W/(m²·K) 0.17 BTU/(h·ft²·°F) 5.74 0.85
1.09 W/(m²·K) 0.19 BTU/(h·ft²·°F) 5.21 0.94
1.19 W/(m²·K) 0.21 BTU/(h·ft²·°F) 4.77 1.02
1.29 W/(m²·K) 0.23 BTU/(h·ft²·°F) 4.4 1.11

Printed from rocketcalc.io/heat-transfer/metric-u-value-to-us-u-factor/0.99