Free Calculator

How Many Quilt Blocks Do I Need?

Pick your quilt size and block size to get an instant layout — number of blocks, rows, columns, and fabric estimates.

Count your blocks

Quilt sizeQuilt width (in)Quilt length (in)Finished block (in)Sashing between blocksBorder

You need 16 blocks — 4 across × 4 down at 12″ with 2″ sashing and a 3″ border, finishing at 60″ × 60″ (0″ narrower and 12″ shorter than your target — widen the border or add a row to make it up).

Fabric estimate

Blocks: 1⅞ yd of each of two fabrics
Sashing: ⅝ yd
Border: ¾ yd
Backing: 4 yd
Binding: ½ yd
About 9⅝ yd all together — add 10–15% for cutting waste.

Set edge to edge instead

With no sashing or border the same quilt takes 30 blocks. Sashing and borders are the easy way to reach a size with fewer blocks.

Full Throw / Lap × 12-inch page — layout diagram and fabric breakdown.

Blocks are whole: N blocks plus N−1 sashing gaps have to fit inside the border, so the finished size can land a little under your target. Fabric assumes a two-fabric block and 40″ usable width, rounded up to ⅛ yd.

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Choose a quilt size to get started:

Baby / Crib

40″ × 52″

Crib, stroller, tummy time mat

4-inch 6-inch 8-inch 9-inch 10-inch 12-inch 14-inch 15-inch 18-inch

Baby / Crib size guide

Throw / Lap

60″ × 72″

Sofa, armchair, single adult use

4-inch 6-inch 8-inch 9-inch 10-inch 12-inch 14-inch 15-inch 18-inch

Throw / Lap size guide

Twin

66″ × 88″

Twin bed, children's bed, daybed

4-inch 6-inch 8-inch 9-inch 10-inch 12-inch 14-inch 15-inch 18-inch

Twin size guide

Full / Double

80″ × 96″

Full/double bed, guest room

4-inch 6-inch 8-inch 9-inch 10-inch 12-inch 14-inch 15-inch 18-inch

Full / Double size guide

Queen

90″ × 108″

Queen bed, master bedroom

4-inch 6-inch 8-inch 9-inch 10-inch 12-inch 14-inch 15-inch 18-inch

Queen size guide

King

108″ × 108″

King bed, California king

4-inch 6-inch 8-inch 9-inch 10-inch 12-inch 14-inch 15-inch 18-inch

King size guide

Most Popular Combinations

Queen quilt with 12-inch blocks→Throw quilt with 12-inch blocks→Baby quilt with 6-inch blocks→Twin quilt with 12-inch blocks→Queen quilt with 9-inch blocks→Throw quilt with 6-inch blocks→King quilt with 12-inch blocks→Baby quilt with 4-inch blocks→

Frequently Asked Questions

How many quilt blocks do I need for a queen quilt?

A queen quilt (90×108 inches) needs 42 twelve-inch blocks in a 6×7 grid with 2-inch sashing and a 3-inch border, or 63 blocks (7×9) set without sashing. An eighth row with sashing would run 116 inches — too long for a queen. Use the queen calculator above for exact numbers.

How many quilt blocks do I need for a throw quilt?

A throw quilt (60×72 inches) needs 16 twelve-inch blocks in a 4×4 grid with 2-inch sashing and a 3-inch border, or 30 blocks (5×6) set without sashing. Use the throw calculator above for exact numbers.

How many quilt blocks do I need for a baby quilt?

A baby quilt (40×52 inches) needs 24 six-inch blocks in a 4×6 grid with 2-inch sashing and a 3-inch border, or 48 blocks (6×8) set without sashing. The block size significantly affects the count — use the baby calculator above for exact numbers.

How do I calculate how many quilt blocks I need?

Divide the quilt width by the finished block size to get the number of columns, and divide the quilt height by the block size to get the number of rows. Multiply columns × rows for the total block count. If adding sashing, subtract the sashing width from each block's space first. The calculator above handles this automatically for all standard quilt sizes.

Designing a quilt from scratch?

Use our Quilt Designer to arrange real blocks into a full layout — then come back here to calculate exactly how many blocks you need.

Try the Quilt Designer

Need block ideas first? Browse the quilt block library — 1,400+ handmade blocks by state and theme.

Already know your block count?

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