Fabric Yardage Calculator
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What Your Result Means
- Yardage Needed: The total fabric you should purchase, rounded up to the nearest 1/8 yard. Fabric stores typically cut in 1/8-yard increments, so this is the minimum purchase amount.
- Seam Allowance: Extra fabric added to each edge for sewing. The calculator adds the allowance to both sides of width and length (so a 1/4" allowance adds 1/2" total to each dimension).
- 10% Waste Factor: A built-in buffer for cutting waste, pattern alignment, and fabric imperfections. For directional prints or nap fabrics, you may need to add more.
How This Calculator Works
You enter the project piece dimensions, fabric bolt width, number of pieces, and seam allowance. The tool adds seam allowance to all four sides, computes the area per piece, multiplies by the number of pieces, applies a 10% waste factor, divides by the fabric bolt width to get a linear length in inches, converts to yards, and rounds up to the nearest 1/8 yard. It assumes rectangular pieces laid out along the fabric width with no pattern matching or nap consideration.
Quick Questions
What if my fabric has a directional print or nap?
Directional prints and napped fabrics (like velvet or corduroy) require all pieces to be cut in the same direction, which typically increases waste by 15–25% beyond the standard 10% factor. Consider adding an extra 1/4 to 1/2 yard to the result.
Which seam allowance should I use?
Most commercial sewing patterns use a 5/8" allowance. Quilting projects typically use 1/4". If you are working without a pattern, 3/8" is a common middle ground. Check your pattern instructions for the specified allowance.
What fabric width should I choose?
Standard quilting cotton is 44–45 inches wide. Apparel fabrics vary from 45 to 60 inches. Home decor fabrics are often 54 inches. Check the bolt end or the retailer's listing for the actual width.
Does this account for fabric shrinkage?
No. Many natural fabrics (cotton, linen) can shrink 3–5% after the first wash. If you plan to pre-wash your fabric, buy an additional 5–10% beyond what this calculator suggests.
Sources
- Wikipedia — Textile (fabric types, widths, and measurement standards)
- Craftsy / Bluprint (sewing tutorials and yardage estimation guides)
Method & review
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.