Fabric Calculator — Yards Needed by Project
Estimate fabric yardage for curtains, tablecloths, upholstery, and quilts. Accounts for fabric width, pattern repeat, fullness, and standard waste.
Use 0 for solid or random patterns. Otherwise the vertical repeat shown on the bolt.
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Frequently asked questions
How much fabric do I need for curtains?
Two key factors: fullness (the curtain should be wider than the window for proper draping) and length. Standard fullness is 2× window width; sheer or luxurious is 2.5×. For a 48-inch window with 2 panels at 2× fullness and a 60-inch finished length, you'll need roughly 4–6 yards of 54-inch fabric depending on pattern repeat.
Does fabric width matter?
Yes — substantially. Quilting cotton is typically 44–45 inches, decorator goods are 54 inches, and upholstery weights run 54–60 inches. A wider bolt may need fewer widths for the same finished piece. Always confirm bolt width before calculating yardage.
What is pattern repeat and why does it matter?
Pattern repeat is the vertical distance over which a design repeats itself. When seaming panels together, the pattern must match across the seam — which can waste up to a full repeat per panel cut. Larger repeats (10+ inches) significantly increase yardage; small or random patterns add little.
How do I account for shrinkage?
Pre-wash cotton, linen, and other natural fibers before cutting. Shrinkage averages 3–5% for woven cotton, up to 10% for linen. Synthetic fabrics typically don't shrink. The 10% waste allowance in most yardage calculators covers shrinkage, but for any project that will be machine-washed regularly (curtains, slipcovers), pre-wash first.
Where can I buy fabric online?
Major US online retailers: Fabric.com, JOANN.com, Mood Fabrics, Hobby Lobby, Spoonflower (custom prints). For decorator fabric, Calico Corners and Fabricuts. For quilting cotton, the Fat Quarter Shop and Missouri Star Quilt Co. Order swatches first — colors photograph differently than they appear in person.