Fabric Yardage Estimator
Yards
1.67
Meters
1.52
How it works
Buying the right amount of fabric is critical — fabric is often sold off the bolt and cannot be returned once cut. The Fabric Yardage Estimator calculates yards needed for rectangles, garment pieces, and projects with seam allowances and fabric width adjustments.
**Fabric width matters** Most apparel fabric is 44/45 inches or 58/60 inches wide. A pattern requiring 3 yards at 60 inches wide needs approximately 4 yards at 45 inches wide — same area, narrower fabric.
**Pattern repeats** Striped, plaid, and large print fabrics require extra yardage for pattern matching. A 12-inch vertical repeat requires approximately one extra repeat per major pattern piece, typically 0.5 to 1 yard extra.
**Layout efficiency** Nap fabrics such as velvet, corduroy, and directional prints require all pattern pieces to run in the same direction. Single-direction layout uses approximately 15 to 25% more fabric than without-nap layout.
**Seam and hem allowances** Most sewing patterns include 5/8-inch seam allowances. If your pattern does not include seam allowances, add 1.25 inches to each cut dimension per seam. For hems, add 1 to 3 inches depending on hem finish.
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Frequently Asked Questions
- Nap refers to the pile or directional surface of fabric. Velvet, corduroy, fleece, and some knits have nap — the surface looks and feels different depending on direction. Directional prints (flowers facing up, characters facing right) also require nap layout. 'With nap' layout places all pattern pieces in the same direction on the fabric — this uses more yardage but is essential for consistent color appearance (nap reflects light differently when pieces run opposite directions). 'Without nap' layout allows pieces to be rotated 180 degrees — more layout flexibility, less waste. Your pattern will list yardage for both layouts; use 'with nap' whenever your fabric has any directional element.
- For a vertical repeat: add one full repeat length for each major pattern piece that spans more than one repeat. For a horizontal repeat: add one full repeat width per seam where you need to match across seams. Practical rule: for a repeat under 4 inches, add 1/2 yard. For 4–12 inch repeat, add 1/2 yard per yard of fabric already needed. For repeats over 12 inches, add one full repeat per yard. Large geometric and floral prints (12–24 inch repeats) can add 1–2 yards to a garment that would otherwise use 3 yards — factor this into your budget before purchasing.
- Yes, but you must recalculate. The total area of fabric needed stays constant; yardage changes with width. Formula: new yardage = (original yardage × original width) ÷ new width. If a pattern requires 3 yards of 60-inch fabric: 3 × 60 ÷ 45 = 4 yards of 45-inch fabric. Important caveat: this math works for simple rectangles, but actual pattern layout may require slightly more because some pieces need to be cut on specific fold lines or can't be rotated. Add 5–10% to the calculated amount and verify by sketching your layout before cutting.
- The selvage is the finished edge of the fabric along both long sides — the edge that runs parallel to the grain. Selvages are tightly woven and won't fray, but they often have a different texture, tension, or decoration (brand name, color dots). Never include selvage in your garment pieces — it can cause puckering at seams because it's woven more tightly than the fabric body. Most patterns are laid on folded fabric with the selvages aligned. When calculating usable width, subtract 1/2 to 1 inch per selvage edge — a 60-inch fabric might have 58–59 inches of usable width. For most calculations this difference is negligible, but for tight layouts, it matters.