Insulated Glass Unit Calculator
IGU specifications from thermal and condensation requirements.
Inputs
Results
U-value (W/m²K)
2.86
R-value (m²K/W)0.35
R-value (imperial)1.99
SHGC (estimate)0.74
Condensation resistance64
Total IGU thickness (mm)20
Weight (kg/m²)20
How to Use This Calculator
- Enter outer pane, inner pane (and third pane if triple glazing) thicknesses in mm.
- Enter Gap 1 and Gap 2 widths in mm and select the Gas Fill: air, argon, krypton, or xenon.
- Enter the number of Low-E coatings (0–3) applied to the glass surfaces.
- Review U-Value in W/m²K and R-Value — lower U-values indicate better thermal insulation.
- Check SHGC, Condensation Resistance, and Total IGU Thickness for specification compliance.
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