R-Value of Insulation
Calculate R-Value of Insulation instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
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 the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.