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R-value (US) to RSI (metric R-value)

Convert R-value (US) to RSI (metric R-value), with the math shown step by step.

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RSI (metric R-value)
3.3 RSI (m²·K/W)

18.74 R (ft²·°F·h/BTU) = 3.3 RSI (m²·K/W)

Also equals

How it works

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

One R-value (US) is about 5.67826334 RSI (metric R-value), so multiplying by 5.67826334 turns R-value (US) into RSI (metric R-value). For example, 13 R (ft²·°F·h/BTU) is about 2.289 RSI (m²·K/W).

  1. Multiply by 5.67826334 18.74 × 5.67826334 = 3.3 RSI (m²·K/W)

Nearby values

R-value (US) RSI (metric R-value) Watts per square meter-kelvin Kilocalories per hour-square meter-degree Celsius
15.74 R (ft²·°F·h/BTU) 2.77 RSI (m²·K/W) 0.36 0.31
16.74 R (ft²·°F·h/BTU) 2.95 RSI (m²·K/W) 0.34 0.29
17.74 R (ft²·°F·h/BTU) 3.12 RSI (m²·K/W) 0.32 0.28
18.74 R (ft²·°F·h/BTU) 3.3 RSI (m²·K/W) 0.3 0.26
19.74 R (ft²·°F·h/BTU) 3.48 RSI (m²·K/W) 0.29 0.25
20.74 R (ft²·°F·h/BTU) 3.65 RSI (m²·K/W) 0.27 0.24
21.74 R (ft²·°F·h/BTU) 3.83 RSI (m²·K/W) 0.26 0.22

Printed from rocketcalc.io/heat-transfer/r-value-to-rsi/18.74