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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.

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

3.61 BTU/(h·ft²·°F) = 20.5 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 3.61 × 5.67826334 = 20.5 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
3.58 BTU/(h·ft²·°F) 20.33 W/(m²·K) 0.05 17.49
3.59 BTU/(h·ft²·°F) 20.38 W/(m²·K) 0.05 17.54
3.6 BTU/(h·ft²·°F) 20.44 W/(m²·K) 0.05 17.59
3.61 BTU/(h·ft²·°F) 20.5 W/(m²·K) 0.05 17.64
3.62 BTU/(h·ft²·°F) 20.56 W/(m²·K) 0.05 17.69
3.63 BTU/(h·ft²·°F) 20.61 W/(m²·K) 0.05 17.74
3.64 BTU/(h·ft²·°F) 20.67 W/(m²·K) 0.05 17.78

Printed from rocketcalc.io/heat-transfer/us-u-factor-to-metric-u-value/3.61