Curtain Calculator
Calculate
Formula
Fabric Width = Window Width × 2. Fabric Height = Window Height + 6". Panels = Fabric Width ÷ 50.
Frequently Asked Questions
Why multiply window width by 2?
A 2× fullness multiplier gives curtains a full, gathered look when closed. Use 1.5× for a flatter look or 2.5× for extra fullness.
How much extra fabric for hems?
Add about 6 inches total for top and bottom hems. Some styles may need more for rod pockets or headers.
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