How Much Fabric Do I Need? Yardage Made Simple
A yard of fabric is a strange unit: fixed in one direction, wildly variable in the other. Here's the math that keeps you from buying twice.
A yard of fabric is 36 inches long, and that's the last simple thing about it, because the other direction (the width) depends entirely on the bolt. Quilting cotton usually comes 42–44 inches wide; apparel fabric often 54–60. The same "two yards" is a very different amount of cloth on different bolts, which is why yardage questions can't be answered without asking what you're buying. So let's do it properly.
The units, quickly
- A yard: 36" along the selvage, full bolt width across. A half yard is 18" x width, a quarter yard 9" x width.
- A fat quarter: a quilting cut, 18" x 21"ish, which is a quarter yard's worth of fabric in a friendlier shape. The whole precut family is covered in my precuts guide.
- WOF: width of fabric. Quilt instructions say "cut 6 strips WOF" and assume roughly 42".
Ballparks for common projects
Every pattern prints exact requirements on the envelope, and the envelope wins every argument. But for planning and impulse purchases, these are honest ballparks on standard widths:
| Project | Typical yardage |
|---|---|
| Throw pillow cover (18") | 5/8–3/4 yd |
| Tote bag | 1–1.5 yd plus lining |
| Baby blanket | 1–1.5 yd each side |
| Pajama pants, adult | 2.5–3 yd |
| Simple knit top | 1.5–2 yd |
| Button-up shirt | 2–2.5 yd |
| Simple dress | 2.5–4 yd |
| Throw quilt top (50 x 65") | 3.5–4.5 yd total across prints |
| Curtain panel | window height + 16", times fullness |
Three things quietly inflate these numbers. Narrow fabric: a pattern quoting 60"-width yardage needs up to half again as much on a 44" bolt; the envelope prints both columns, so read the right one. Nap and direction: corduroy, velvet, and one-way prints need all pieces cut facing the same way, which wastes cloth by design. Pattern matching: plaids and large prints need extra to line up at the seams, usually an added quarter to half yard.
Always buy the insurance quarter
Buy a quarter yard beyond your math, every time. It covers shrinkage in the prewash, one miscut piece, and the fact that dye lots change between bolts, so going back next month for "a little more" often means buying fabric that doesn't quite match. A quarter yard costs a couple of dollars. Running short costs the project.
The reverse mistake is real too: buying three yards of everything "to be safe" is how stashes eat guest rooms. Fabric you bought without a project is a decision deferred, not a decision made. (She says, in front of her stash, unrepentant but honest.)
What to bring and what to ask
Bring: the pattern envelope or your project measurements, and a note of your fabric's width if you're mixing sources. Ask the cutting counter: "How wide is this bolt?", "Will this shrink much?", and "Can you double-check my yardage for this pattern?" The person cutting has done this math ten thousand times and will catch the mistake in yours before the scissors do. That check is free, and it's the single best reason to buy fabric from a real fabric store with a staffed counter. Find one near you with our store finder.