Home measurement calculator
Curtain Size Calculator
Estimate curtain rod width, finished panel width, finished length, fabric drops, and fabric yards from your window measurements. This calculator is built for homeowners comparing ready-made panels or planning custom curtain fabric.
Frequently asked questions
How much wider should curtains be than the window?
A common starting point is 1.5x to 2.5x the rod width, depending on the fullness you want and the fabric weight.
Should the rod be wider than the window?
Yes. Extending the rod several inches on each side lets panels clear more glass when open and makes the window look wider.
Does this replace a workroom quote?
No. Use this as an estimate before buying fabric, then confirm exact yardage with the fabric seller or workroom.