Cheerful Pinwheel Granny Square Crochet Pattern — Step-by-Step Guide

Brighten your next crochet project with this cheerful Pinwheel Granny Square. The pattern uses alternating colors to build a spiral pinwheel center that expands into a textured round granny square—perfect for blankets, cushions, bags or colorful modular projects. The instructions below are written for interchangeable yarn weights; the sample was worked in bulky yarn with a 6 mm hook.

Caption: Pinwheel Granny Square showing the spiral center and textured rounds in two contrasting colors.

Alt (for the image): crocheted pinwheel granny square in two colors with spiral center and textured stitches

Materials:

You can use any yarn weight & recommended hook size. The sample is shown in Bulky Weight Yarn, crocheted with a 6 mm hook. You’ll switch between two colors of yarn (A and B).

Abbreviations: ch = chain, sc = single crochet, hdc = half double crochet, dc = double crochet, tr = treble (triple) crochet, sl st = slip stitch.

Notes:

Fasten off your work each time you change colors, and then crochet over your yarn tails as you go to avoid having to do it all at the end. Use a tapestry needle to weave in ends when finishing. Blocking is recommended to help the square lay flat. Finished size will depend on yarn weight and hook.

Magic Ring or Ch 4 and sl st to the 1st ch to form a ring.

Round 1 A: Ch 1, 8 sc into ring, sl st to join. (8)

Round 2: Ch 1, 2 sc in each st around, sl st to join. (16)

Round 3 B: Ch 3 (counts as dc), hdc, sc, hdc, *dc, hdc, sc, hdc, repeat from * around, sl st to join to the top of ch 3. (16)

Round 4 A: Ch 1, *sc, hdc, dc, tr, ch 4, repeat from * around, sl st to join. (32)

Attach yarn B to any ch 4 sp.

Round 5 B: Ch 1, *(2 sc, 2 hdc) in ch-4 sp, dc next 2 sts, tr next 2 sts, ch 4, repeat from * around, sl st to join. (48)

Attach yarn A to any ch 4 sp.

Round 6 A: Ch 1,*(3 sc, hdc) in ch-4 sp, hdc next 2 sts, dc next 3 sts, tr next 3 sts, ch 4, repeat from * around, sl st to join. (64)

Attach yarn B to any ch 4 sp.

Round 7 B: Ch 1,*4 sc in ch-4 sp, hdc next 4 sts, dc next 4 sts, tr next 4 sts, ch 4, repeat from * around, sl st to join (80)

Attach yarn A to any ch 4 sp.

Round 8 A: Ch 1,*4 sc in ch-4 sp, sc next st, hdc next 5 sts, dc next 5 sts, tr next 5 sts, ch 4, repeat from * around, sl st to join. (96)

Attach yarn B to any ch 4 sp.

Round 9 B: Ch 1,*4 sc in ch-4 sp, sc next 2 sts, hdc next 6 sts, dc next 6 sts, tr next 6 sts, ch 4, repeat from * around, sl st to join. (112)

Edging

Sc in each st, 4 sc in each ch-4 sp, sl st to join.

Finishing & tips:

— Weave in ends as you go for a neater finish and less work at the end.
— Block each square to flatten and square up the edges before joining.
— To join multiple squares, try slip-stitch joining or whipstitch with a matching yarn.

Enjoy making a set of these pinwheel squares for a playful, colorful finished project.