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Quilt Batting Calculator

Enter your quilt size to see how big to cut your batting, how many quilts a 96" or 120" roll makes, and what each quilt costs. The calculator also shows the packaged batt that would fit the same quilt, so you can see whether a roll or a single batt makes more sense for you.

Making one quilt? A pre-packaged batt is usually the simpler buy. Quilting often or for customers? Compare quilt batting rolls: Soft & Elegant 80/20, Simply Cotton 100% cotton and Perfect Blend 6 oz. Not sure which fiber? Read 80/20 vs 100% cotton batting or the batting size guide.

Quilt size

Sizes from our quilt size chart. Patterns vary, so enter your own quilt top if you have it.

Batting rolls

RollFits?Length usedQuilts per rollCost per quilt

Packaged batting (one quilt)

BattingSmallest size that fitsPrice

Estimates only, using current ThreadWorks prices. Measure your quilt top before cutting. Roll yield assumes the larger batting dimension runs across the roll when it fits.

How the Batting Calculator Works

Add the extra batting you need on every side to the width and length of your quilt top. Longarm quilters usually ask for 4" per side; on a home machine 2–3" is often enough. The calculator then checks each roll: if the larger batting dimension fits across the roll, the smaller one is the length you cut; if not, the larger one becomes the length. A 30-yard roll is 1,080" long, so quilts per roll is 1,080 divided by the length you cut, rounded down.

Frequently Asked Questions

How much bigger than the quilt top should batting be?

About 4" on every side for longarm quilting, so 8" added to the width and the length. For quilting on a home machine, 2–3" per side is usually enough.

Should I buy a 96" or 120" batting roll?

A 96" roll covers quilts up to about 88" wide with 4" to spare on each side. Choose 120" if you make queen and king quilts regularly. See What Size Batting Do I Need?

Is a batting roll cheaper than packaged batting?

Per quilt, yes, once you use enough of the roll. The calculator shows the quilt number at which a roll becomes cheaper than buying packaged batts big enough for the same quilt. See Quilt Batting by the Roll for worked examples.

Which batting should I choose?

For most quilts, an 80/20 cotton/poly. For an all-natural, flatter quilt, 100% cotton. Compare them in 80/20 vs 100% Cotton Batting.

Shop quilt batting rolls · Shop pre-packaged batting

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