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Precut Fabric Calculator

Pick a quilt size and a precut type to see how many layer cakes, charm packs, jelly rolls or fat quarters you need, the finished size you will actually get, and how many binding strips to cut. Every number assumes ¼" seams and uses the same quilt sizes as our batting calculator.

Quilt size (finished, including any border)

Sizes match our quilt size chart and the batting calculator. Following a pattern? Its fabric requirements win.

Same quilt, every precut

PrecutPiecesPacksFinished top

Estimates for simple layouts: squares sewn edge to edge, or an all-strip quilt. Precut edges are often pinked, so measure point to point and sew an accurate ¼" seam. Always check the piece count on the product you buy.

Precut Reference Chart

Squares sewn edge to edge and all-strip quilts, with standard packs (42 squares per stack or charm pack, 40 strips per roll) and the "at least this size" rule. Sizes match our quilt size chart.

Quilt10" squares5" charms2.5" stripsFat quarters (as 10" squares)Fat quarters (as 5" squares)Binding strips (2½" × width of fabric)
Crib 36" × 52"24 squares: 1 stack (38" × 57")96: 3 packs24: 1 roll1285
Throw 50" × 65"42 squares: 1 stack (57" × 66½")180: 5 packs41: 2 rolls (1 roll makes 50" × 64")21156
Twin 70" × 90"80 squares: 2 stacks (76" × 95")320: 8 packs79: 2 rolls40279
Full 81" × 96"99 squares: 3 stacks (85½" × 104½")396: 10 packs98: 3 rolls503310
Queen 90" × 108"120 squares: 3 stacks (95" × 114")480: 12 packs122: 4 rolls (3 rolls make about 90" × 106")604011
King 110" × 108"144 squares: 4 stacks (114" × 114")600: 15 packs149: 4 rolls725012

How We Calculate

  • Squares: each square loses ½" to two ¼" seams, so a 10" square finishes at 9½", a 5" square at 4½" and a 2½" square at 2". Squares across = quilt width ÷ finished size, squares down = quilt length ÷ finished size, each rounded up ("at least this size") or to the nearest whole square ("closest size"). Packs = squares ÷ pieces per pack, rounded up.
  • 2½" strips: for an all-strip quilt, each strip finishes 2" wide with about 40" of usable length after trimming selvages, so one strip covers about 80 square inches and a 40-strip roll about 3,200. Strips = quilt area ÷ 80, rounded up.
  • Fat quarters: we assume 18" × 21" of usable fabric, which cuts two 10" squares, twelve 5" squares, fifty-six 2½" squares, or seven 2½" strips about 21" long.
  • Binding: the perimeter plus 10" for joining, divided by 40" per strip, rounded up.
  • Borders: a border shrinks the patchwork area. Buy border fabric as yardage.

These are estimates for simple layouts. If you are following a pattern, its fabric requirements win. Piece counts vary by brand, so check the listing and change the pack size in the calculator.

Frequently Asked Questions

How many layer cakes do I need for a queen quilt?

Three 42-piece stacks for a 90" × 108" queen sewn edge to edge. That is 120 squares in a 10 × 12 layout, finishing at 95" × 114". A border lets you use fewer squares.

How many jelly rolls do I need for a throw quilt?

One 40-strip roll makes an all-strip top of about 50" × 64". A 50" × 65" throw needs 41 strips, so add a narrow border or a second roll.

What size quilt does one charm pack make?

A 42-piece charm pack sewn 6 × 7 finishes at 27" × 31½", a doll or baby quilt top. Most throws need four to five packs.

How many fat quarters do I need for a quilt?

Cut into 10" squares, about 21 fat quarters for a 50" × 65" throw and 60 for a 90" × 108" queen. Cut into 5" squares, about 15 and 40.

Do precuts include seam allowance?

Yes. A 10" square is cut at 10" and finishes at 9½" once it is sewn on all sides with ¼" seams.

Shop all fabric and precuts · Layer cakes and 10" squares · Jelly rolls and 2½" strips · Charm packs · Fat quarter bundles

Learn more: Precut Fabric Explained · How Many 10" Squares Do I Need? · How Many Jelly Roll Strips Do I Need? · What Is Island Batik? · Quilt batting calculator

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