Curtain Fabric Calculator
Calculate how much fabric you need for window curtains and drapes. Accounts for window width, drop length, fullness ratio, hems, and pattern repeats.
Plan your custom drapery projects with precision. Enter window width and drop length, select your preferred fullness ratio (1.5x, 2.0x, 2.5x), bolt width (54", 60", 118"), and pattern repeat to calculate total yardage and panel cuts without expensive mistakes.
Key Features & Calculations
- Accounts for standard fullness ratios (1.5x, 2.0x, 2.5x, 3.0x)
- Calculates total widths/panels needed across bolt width
- Accommodates vertical pattern repeat matching
- Includes header (4") and double bottom hem (8") allowances
- Outputs both US linear yards and metric meters
Frequently Asked Questions
What fullness ratio should I use for curtains?
2.0x fullness is the standard for most pleated or rod-pocket draperies. Sheer voile curtains look best at 2.5x to 3.0x fullness for privacy and rich gathers. Heavier fabrics like velvet look luxurious at 2.0x to 2.2x.
How much extra length do I need for curtain hems?
Standard drapery construction requires 8 inches for a 4-inch double bottom hem and 4 inches for the top heading (12 inches total added to the finished drop).
What is wide-width curtain fabric?
Wide-width drapery fabric (108" to 118" wide) is designed to be turned sideways (railroaded) so you can make seamless curtains for wide windows without vertical joins.