Curtain Wall Design Calculator
Calculate curtain wall panel counts, mullion quantities, transom counts, glass area, and structural sealant for facade design.
Inputs
Results
Glass Panels
84
Total Glass Area
2,520 sq ft
≈ 11 one-car garages
How to Use This Calculator
- Enter the Facade Width and Facade Height in feet for the overall curtain wall system.
- Enter Mullion Spacing, Panel Width, and Panel Height in feet to define the grid.
- Enter the Design Wind Load in psf per local building code requirements.
- Review Glass Panel Count, Vertical Mullions, Horizontal Transoms, and Total Glass Area.
- Check Structural Sealant length in linear feet for glazing and weatherproofing installation.
How the result changes with Facade Height
| Facade Height | Glass Panels | Total Glass Area |
|---|---|---|
| 50 | 108 | 3,240 sq ft |
| 175 | 360 | 10,800 sq ft |
| 325 | 660 | 19,800 sq ft |
| 450 | 900 | 27,000 sq ft |
What each input means
- Facade Width
- Total width of the curtain wall facade.
- Facade Height
- Total height of the curtain wall facade.
- Mullion Spacing
- Center-to-center spacing between vertical mullions.
- Panel Width
- Width of each glass panel (should match mullion spacing).
- Panel Height
- Height of each glass panel between transoms.
- Design Wind Load
- Design wind pressure for structural calculations (per local code).
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersFacade Width = 60, Facade Height = 40, Mullion Spacing = 5, Panel Width = 5 = 6 input(s) provided
- Calculate Glass PanelsGlass Panels84 = 84
- Calculate Total Glass AreaTotal Glass Area2520 = 2520
- Calculate Vertical MullionsVertical Mullions13 = 13
- Calculate Horizontal TransomsHorizontal Transoms72 = 72
Engine last updated . Checked against 1 independently-derived test — how we verify calculators.
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