Fabric Yardage Calculator
Calculate fabric needed for sewing projects from pattern pieces and fabric width. Enter values for instant results with step-by-step formulas.
Formula
Yards = (Rows x Piece Length x (1 + Waste%)) / 36
The calculator determines how many pattern pieces fit across the fabric width (accounting for seam allowances), calculates the number of rows needed, multiplies by the piece length, adds waste factor and pattern repeat adjustments, then converts total inches to yards.
Worked Examples
Example 1: Simple Dress with 8 Pattern Pieces
Problem: Calculate fabric for a dress with 8 pattern pieces averaging 24 inches long by 15 inches wide on 45-inch fabric, 5/8 inch seam allowance, 15% waste.
Solution: Piece with seams: 15 + (2 x 0.625) = 16.25 inches wide\nPieces across 45\" fabric: floor(45 / 16.25) = 2\nRows needed: ceil(8 / 2) = 4\nLength per row: 24 + (2 x 0.625) = 25.25 inches\nTotal length: 4 x 25.25 = 101 inches\nWith 15% waste: 101 x 1.15 = 116.15 inches\nYards: 116.15 / 36 = 3.23 yards
Result: 3.23 yards needed | Round up to 3.25 yards (3 1/4 yd)
Example 2: Curtain Panels with Pattern Repeat
Problem: 4 curtain panels, each needs 6 pattern pieces, averaging 48 inches long by 20 inches wide. 54-inch fabric with 12-inch pattern repeat. 10% waste.
Solution: Piece width with seams: 20 + 1.25 = 21.25 inches\nPieces across 54\" fabric: floor(54 / 21.25) = 2\nRows per panel: ceil(6 / 2) = 3\nLength per row (with repeat): ceil(49.25 / 12) x 12 = 60 inches\nTotal per panel: 3 x 60 = 180 inches\nWith 10% waste: 180 x 1.10 = 198 inches = 5.5 yards\nFor 4 panels: 5.5 x 4 = 22 yards
Result: 22 yards total for 4 panels | 5.5 yards per panel
Frequently Asked Questions
How do I calculate fabric yardage for a sewing project?
To calculate fabric yardage, start by determining the number of pattern pieces and their dimensions. Add seam allowances to each piece (typically 5/8 inch or 1.5 cm). Then consider how many pieces fit across the fabric width (typically 45 or 60 inches). Divide the total number of pieces by pieces-across to find how many rows you need, and multiply rows by the piece length to get total length needed. Add a waste factor of 10% to 20% for cutting errors, pattern matching, and fabric flaws. Finally, divide the total length in inches by 36 to convert to yards. Always round up to the nearest 1/8 yard when purchasing.
What fabric widths are commonly available?
Fabric widths vary by type and are important for accurate yardage calculations. The most common widths are: 45 inches (114 cm), standard for quilting cotton, broadcloth, and many dress fabrics; 54 to 60 inches (137-152 cm), common for apparel fabrics like wool, linen, and polyester blends; 108 to 120 inches (274-305 cm), available for quilt backing and sheeting fabrics; and 36 inches (91 cm), sometimes found in specialty silks and vintage-style fabrics. Wider fabrics allow more efficient piece placement and may require less total yardage. When substituting a different width than called for in a pattern, you will need to recalculate the yardage requirements.
How does pattern repeat affect fabric yardage needs?
Pattern repeat refers to the distance between identical elements in a printed or woven design. Matching pattern repeats at seams requires additional fabric because you must align the design across pieces, resulting in more waste. A small repeat of 1 to 3 inches adds about 10% to 15% extra fabric. Medium repeats of 4 to 12 inches may add 15% to 25% extra. Large repeats of 13 to 27 inches or more can add 25% to 50% additional fabric. To calculate, divide each cut piece length by the repeat distance, round up to the next whole number, and multiply by the repeat distance. This ensures each piece starts at the same point in the pattern.
How much extra fabric should I buy beyond the calculated amount?
Beyond the calculated yardage, it is wise to buy extra fabric as a safety margin. A good rule of thumb is to add 10% to 15% for simple projects with no pattern matching, 15% to 20% for projects with pattern matching or directional prints (nap fabrics like velvet or corduroy), and 20% to 25% for beginners who may make cutting errors. Additionally, consider buying extra for potential alterations, test sewing on scraps, making matching accessories like belts or headbands, and future repairs. Pre-washing can cause shrinkage of 2% to 5% for cotton and up to 10% for linen, so factor this in before cutting. When in doubt, an extra half yard provides valuable insurance.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.
Can I share or bookmark my calculation?
You can bookmark the calculator page in your browser. Many calculators also display a shareable result summary you can copy. The page URL stays the same so returning to it will bring you back to the same tool.