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Blind Size Calculator

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Calculate the correct blind size for your windows to ensure a proper fit and light control.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Window Width (inches), Window Height (inches), Mount Type, Desired Overlap Width (inches) - for outside mount, and Desired Overlap Height (inches) - for outside mount in the units shown.

Step 2

Read Blind Height (inches) and Blind Width (inches) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Small Window, Inside Mount

Window Width (inches): 24; Window Height (inches): 36; Mount Type: Inside Mount; Desired Overlap Width (inches) - for outside mount: 1 inches; Desired Overlap Height (inches) - for outside mount: 1 inches

Blind Height (inches): 36 inches; Blind Width (inches): 24 inches

Medium Window, Inside Mount

Window Width (inches): 36; Window Height (inches): 48; Mount Type: Inside Mount; Desired Overlap Width (inches) - for outside mount: 1 inches; Desired Overlap Height (inches) - for outside mount: 1 inches

Blind Height (inches): 48 inches; Blind Width (inches): 36 inches

Large Window, Inside Mount

Window Width (inches): 60; Window Height (inches): 60; Mount Type: Inside Mount; Desired Overlap Width (inches) - for outside mount: 1 inches; Desired Overlap Height (inches) - for outside mount: 1 inches

Blind Height (inches): 60 inches; Blind Width (inches): 60 inches

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