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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
1.19 W/(m²·K)

0.21 BTU/(h·ft²·°F) = 1.19 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 0.21 × 5.67826334 = 1.19 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
0.18 BTU/(h·ft²·°F) 1.02 W/(m²·K) 0.98 0.88
0.19 BTU/(h·ft²·°F) 1.08 W/(m²·K) 0.93 0.93
0.2 BTU/(h·ft²·°F) 1.14 W/(m²·K) 0.88 0.98
0.21 BTU/(h·ft²·°F) 1.19 W/(m²·K) 0.84 1.03
0.22 BTU/(h·ft²·°F) 1.25 W/(m²·K) 0.8 1.07
0.23 BTU/(h·ft²·°F) 1.31 W/(m²·K) 0.77 1.12
0.24 BTU/(h·ft²·°F) 1.36 W/(m²·K) 0.73 1.17

Printed from rocketcalc.io/heat-transfer/us-u-factor-to-metric-u-value/0.21