R-Value of Insulation
Calculate R-Value of Insulation instantly with the exact formula and a worked example.
R-Value of Insulation
Thickness, cm
Thermal conductivity λ
R-value
3.75m²·K/W
More about: R-Value of Insulation
What it calculates
The “R-Value of Insulation” calculator computes R-value in m²·K/W from 2 parameters: thickness, cm, thermal conductivity λ.
Used in design, material estimation, and structural calculations.
Example calculation
With parameters Thickness, cm = 15, Thermal conductivity λ = 0.04 the result is 3.75 m²·K/W.
How to use
- Enter thickness, cm and thermal conductivity λ — each field above is adjustable with a slider.
- R-value (m²·K/W) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is R-Value of Insulation calculated?
The R-Value of Insulation calculator computes R-value (in m²·K/W) from thickness, cm, thermal conductivity λ. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the R-Value of Insulation calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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