Curtain Fabric Calculator

Curtain fullness refers to the ratio of fabric width compared to the track or pole width. A 1.5x fullness provides a modern, casual look; 2.0x fullness (double fullness) is standard for pencil pleat and eyelet/grommet curtains; 2.5x to 3.0x provides deep, luxurious folds ideal for pinch pleat and formal velvet drapes.

Cut length = Finished Curtain Length + Header Allowance (typically 3 to 4 inches for heading tape or hems) + Bottom Hem Allowance (typically 8 inches for a standard double 4-inch bottom hem) + Pattern Repeat adjustments.

If your fabric has a patterned motif, every cut width must begin at the identical point in the pattern repeat so the prints line up horizontally across the window. Our calculator automatically rounds up each drop to the nearest full pattern repeat.