Calculate window blind sizes for proper fit and coverage.
Mounting Style
Window Dimensions
Ordering Dimensions
Blind Width35.50"Includes 1/2" deduction
Blind Height60.00"
Pro Measuring Tips
1.Always use a metal measuring tape; cloth tapes can stretch.
2.Measure to the nearest 1/8th of an inch.
3.Measure every window separately, even if they look the same size.
About this calculator
Overview
Window blind sizing requires accurate measurements for width and height. Inside mount fits within the window frame; outside mount covers the frame. Proper sizing ensures light control, privacy, and aesthetic appeal.
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Pro Tips
Measure width at top, middle, and bottom—use the narrowest.
For inside mount, subtract 1/4 inch from width for clearance.
Outside mount should extend 2-3 inches beyond frame on each side.
Measure height from top of window to sill or desired length.
