Skip to content

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

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

Favorite
Watts per square meter-kelvin
20.1 W/(m²·K)

3.54 BTU/(h·ft²·°F) = 20.1 W/(m²·K)

Also equals

How it works

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

One BTU per hour-square foot-degree Fahrenheit is about 5.67826334 watts per square meter-kelvin, so multiplying by 5.67826334 turns BTU per hour-square foot-degree Fahrenheit into watts per square meter-kelvin. For example, 0.3 BTU/(h·ft²·°F) is about 1.703 W/(m²·K).

  1. Multiply by 5.67826334 3.54 × 5.67826334 = 20.1 W/(m²·K)

Nearby values

BTU per hour-square foot-degree Fahrenheit Watts per square meter-kelvin RSI (metric R-value) Kilocalories per hour-square meter-degree Celsius
3.51 BTU/(h·ft²·°F) 19.93 W/(m²·K) 0.05 17.15
3.52 BTU/(h·ft²·°F) 19.99 W/(m²·K) 0.05 17.2
3.53 BTU/(h·ft²·°F) 20.04 W/(m²·K) 0.05 17.25
3.54 BTU/(h·ft²·°F) 20.1 W/(m²·K) 0.05 17.3
3.55 BTU/(h·ft²·°F) 20.16 W/(m²·K) 0.05 17.34
3.56 BTU/(h·ft²·°F) 20.21 W/(m²·K) 0.05 17.39
3.57 BTU/(h·ft²·°F) 20.27 W/(m²·K) 0.05 17.44

Printed from rocketcalc.io/heat-transfer/us-u-factor-to-metric-u-value/3.54