Units & converters

Thermal insulance and R-value converter

Compare area-specific thermal resistance in m²·K/W, US R-values, clo and tog.

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Your inputs

The starting values are an example.

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Converted value = original value × source factor / target factor

1 m²·K/W = 5.678263341 ft²·°F·h/Btu IT (US R).

Thermal insulance describes a layer or construction. US R-values use ft²·°F·h/Btu, so their numerical value differs from the value in m²·K/W.
Rounding is applied only to displayed results. Very small or very large values may appear in scientific notation.