Curtain & Blind Size Calculator

Buying curtains or blinds that don't fit is one of the most common and frustrating home decorating mistakes. This free curtain and blind calculator takes the guesswork out of window treatments by giving you precise measurements for finished drop, fabric width, panel count, and rod or track length. For curtains, simply choose your fullness factor and heading type — the calculator accounts for hem allowances, pleat take-up, and standard overhangs. For blinds, you get both inside mount and outside mount dimensions so you can choose the look you want. Works in both centimetres and inches.