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Crochet stitches, step by step

How to back post double crochet

Back post double crochet (BPdc) · Back post treble (BPtr) in UK patterns

A back post double crochet is worked around the post of the stitch below from behind. The hook goes in from the back, round the front of the post and out to the back again, so the new stitch sits behind the fabric and makes a valley on the side facing you.

  1. Back post double crochet, step 1, in 3D yarn on a hook
    Yarn over (2 loops on hook).
  2. Back post double crochet, step 2, in 3D yarn on a hook
    Insert the hook from back to front round the post of the next stitch, and out to the back again.
  3. Back post double crochet, step 3, in 3D yarn on a hook
    Yarn over and draw up a loop (3 loops on hook).
  4. Back post double crochet, step 4, in 3D yarn on a hook
    Yarn over and draw through 2 loops (2 loops on hook).
  5. Back post double crochet, step 5, in 3D yarn on a hook
    Yarn over and draw through the last 2 loops (1 loop on hook).
  6. Back post double crochet, step 6, in 3D yarn on a hook
    One back post double crochet made.

Rendered from Krowshea's 3D yarn, not photographed or drawn by hand, and shown for a right-handed crocheter.

Good to know

Where it's used
Ribbing, basketweave and other textures, alongside front post stitches.
Its partner
Front post double crochet, which raises the stitch instead. Alternate the two for ribbing.
Chart symbol
A double crochet symbol with a curved hook at its foot. Front and back post hooks curve opposite ways.

Written in Krowshea

Back post double crochet as code

Krowshea is a programming language for crochet. Ribbing: after a row of double crochet, back post stitches take turns with front post ones across each row. Krowshea checked it, then wrote the pattern and drew the chart.

back-post-double-crochet.krowKrowshea

STASH {
    YARN sea = #2F8C8A [ weight: 4 ]
}

// Ribbing: back and front posts alternate
LAYOUT Linear {
    ROW 1 [COLOR: sea]: CH 12, TURN
    ROW 2: CH 3 AS DC, DC 11, TURN
    ROW 3..6: CH 3 AS DC, *BPDC, FPDC* 5 TIMES, DC, TURN
}

Written pattern · US terms

  1. Row 1 (sea): Ch 12, turn. (12 ch)
  2. Row 2: Ch 3 (counts as a dc), dc in next 11 sts, turn. (12 dc)
  3. Rows 3–6: Ch 3 (counts as a dc), [BPdc around post of next st, FPdc around post of next st] 5 times, dc in next st, turn. (2 dc, 5 BPdc, 5 FPdc)
Written by Krowshea from the code, with every stitch count checked

Symbol chart

Crochet symbol chart of the back post double crochet swatch, drawn by Krowshea
Drawn by Krowshea. Symbols follow the Craft Yarn Council chart standard

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Write your own patterns as code

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