Calculate fabric requirements for your sewing projects
Calculating fabric requirements accurately is crucial for successful sewing projects. This calculator helps you determine exactly how much fabric you need based on your project dimensions, fabric width, and seam allowances, preventing costly mistakes and material waste.
The calculator accounts for different project types, each with specific cutting and waste allowances. Garments typically require 10-25% extra fabric for pattern matching, directional prints, and cutting waste, while home decor projects like curtains need additional fabric for hems and fullness.
| Width | Common Uses | Fabric Types |
|---|---|---|
| 36" (91cm) | Quilting, crafts | Cotton prints, quilting cotton |
| 45" (114cm) | Garments, general sewing | Cotton, linen, lightweight fabrics |
| 54" (137cm) | Home decor, upholstery | Decorator fabrics, medium weight |
| 60" (152cm) | Apparel, wide garments | Knits, fleece, specialty fabrics |
| 108" (274cm) | Backing, large projects | Quilt backing, wide cotton |
Standard Seam Allowances: Most commercial patterns use 5/8" (1.5cm) seam allowances, while quilting typically uses 1/4" (0.6cm). Always check your pattern instructions before cutting, as seam allowances directly affect the final dimensions of your project.
Directional Fabrics: Fabrics with nap (velvet, corduroy), one-way prints, or stripes require all pattern pieces to be cut in the same direction, often requiring 25-30% more fabric than non-directional fabrics.
Pattern Matching: Large prints or plaids that need matching at seams require additional fabric. Add one full pattern repeat to your yardage for each major seam that needs matching.
Project: A-line dress with 40" length and 36" width
Fabric: 45" wide cotton with 5/8" seam allowances
Calculation:
Result: Purchase 1.5 yards of 45" wide fabric, which includes 20% extra for cutting waste and pattern adjustments.