Interlocking Pinwheel block

myQuiltGenie
Interlocking Pinwheel block

4 - 12" blocks using 44" fabric bolt width.

Instructions and calculator to make Interlocking Pinwheel blocks using five fabrics. The blocks are made in groups of 2 mirrored sets. Quarter and Half square triangles from squares are used to make these blocks.

[top]Settings

Block size
Number of blocks
Fabric bolt width Coloring page | Jeanne's

[top]Fabrics

Fabric 1
Fabric 1
Cut 1 strip 51/4 inches wide. Subcut into 4 squares.
Cut 2 strips 47/8 inches wide. Subcut into 16 squares.
Fabric 2
Fabric 2
Cut 1 strip 51/4 inches wide. Subcut into 4 squares.
Fabric 3
Fabric 3
Cut 1 strip 51/4 inches wide. Subcut into 4 squares.
Fabric 4
Fabric 4
Cut 1 strip 51/4 inches wide. Subcut into 4 squares.
Fabric 5
Fabric 5
Cut 1 strip 51/4 inches wide. Subcut into 4 squares.

[top]Quarter Square Triangle Instructions

Quarter Square Triangle
  • * Match 1 square each of fabric 2 & 3 right sides together.
  • Draw a diagonal line from corner to corner on wrong side of lighter fabric.
  • Sew 1/4 inch seam on both side of diagonal line.
  • Cut apart on drawn diagonal line.
  • Press seams to one side.
  • Repeat from * using 1 square each of fabric 4 & 5.
  • Match 1 fabric 2 & 3 square to 1 fabric 4 & 5 square, right sides together matching fabric 2 to 5 and fabric 3 to 4.
  • Draw a diagonal line from corner to corner on wrong side crossing previously sewn seam.
  • Sew 1/4 inch seam on both sides of diagonal line.
  • Cut apart on drawn diagonal line.
  • Press seams to one side.
  • Makes 2 sets of mirrored Quarter square triangle units.

Make 2 mirrored sets.

[top]Quarter|Half Square Triangle Instructions

Quarter|Half Square Triangle
  • Match 1 square each of *fabric 2 & 3 right sides together.
  • Draw a diagonal line from corner to corner on wrong side of lighter fabric.
  • Sew 1/4 inch seam on both side of diagonal line.
  • Cut apart on drawn diagonal line.
  • Press seams to one side.
  • Match 1 small fabric 1 square to 1 *fabric 2 & 3 square right sides together.
  • Draw a diagonal line from corner to corner on wrong side crossing previously sewn seam.
  • Sew 1/4 inch seam on both sides of diagonal line.
  • Cut apart on drawn diagonal line.
  • Press seams to one side.
  • Makes 2 sets of mirrored Quarter|Half square triangle units.
  • Repeat replacing * with the following fabric pairs:
    • B - 1 & 2
    • C - 2 & 3 (from above instructions)
    • D - 1 & 3
    • E - 2 & 5
    • F - 3 & 4
    • G - 1 & 5
    • H - 4 & 5
    • I - 1 & 4

Make 2 mirrored sets for each fabric pair.

[top]Interlocking Pinwheel Instructions

Interlocking Pinwheel block layout
  • Layout 2 is a mirror of layout 1, using mirror of units above.
  • Sew blocks together using a 1/4 inch seam as shown in layouts.
  • Press seams to one side.

Make 2 mirrored sets of blocks.