How to Convert a DK Pattern to Worsted Weight
You love a pattern written for DK, but the yarn you have (or the fabric you want) is worsted. The good news: converting between adjacent yarn weights is one of the most manageable pattern adjustments, because the process is pure gauge math — no guessing.
DK typically knits at 21–24 stitches per 4 inches; worsted at 16–20. That gap of roughly 10–20% means every stitch count in the pattern shrinks by that ratio when you switch — and the gauge calculator handles each conversion in seconds.
Step by Step
- 1
Swatch the worsted yarn first
Knit and block a swatch in your worsted yarn at a fabric you like, and measure the real gauge per 4 inches. Don't assume the ball-band number — the whole conversion hangs on this measurement.
- 2
Note the pattern's DK gauge
Find the pattern gauge, e.g. 22 stitches and 30 rows per 4 inches. This is your "from" gauge; your worsted swatch is the "to" gauge.
- 3
Convert the main stitch counts
Multiply each key stitch count by (your gauge ÷ pattern gauge). With a worsted gauge of 18: ratio = 18 ÷ 22 ≈ 0.818. A 220-stitch cast-on becomes 220 × 0.818 ≈ 180 stitches.
- 4
Round to the stitch repeat
Adjust converted counts to fit ribbing or motif repeats — e.g. round 180 to a multiple of 4 for 2×2 rib. A couple of stitches either way changes width by well under half an inch at worsted gauge.
- 5
Convert row-counted sections
Multiply specified row counts by (your row gauge ÷ pattern row gauge). Instructions given in inches ("knit until 14 inches") need no conversion — just follow the measurement.
- 6
Recalculate the yarn requirement
Worsted is thicker, so you need fewer yards than the DK requirement — but not proportionally fewer. As a rule of thumb budget 85–90% of the pattern's yardage, and confirm with a yardage estimate at your actual gauge and dimensions.
Worked example
Pattern: a DK sweater at 22 sts × 30 rows per 4 inches. Your blocked worsted swatch: 18 sts × 26 rows per 4 inches. Stitch ratio 18/22 ≈ 0.818, row ratio 26/30 ≈ 0.867.
| Pattern instruction (DK) | Conversion | Your instruction (worsted) |
|---|---|---|
| Cast on 220 sts | 220 × 0.818 | Cast on 180 sts |
| Body: 110 sts each side | 110 × 0.818 | 90 sts each side |
| Work 20 rows of ribbing | 20 × 0.867 | Work 17 rows (≈ same depth) |
| Sleeve: inc from 48 to 88 sts | 48 → 39, 88 → 72 | Inc from 39 to 72 sts (33 sts total) |
| Knit until piece measures 15″ | no change | Knit until piece measures 15″ |
What changes besides the numbers
The fabric. Worsted at a matching-drape gauge produces a thicker, warmer, slightly stiffer fabric than DK. Fine details — delicate lace, tiny cables — read bolder and chunkier at worsted scale. That's often exactly the look you want, but check your swatch against the pattern photos.
Shaping resolution. Fewer stitches means each stitch is worth more width, so shaping is slightly coarser. Redistribute converted increases and decreases evenly with the Advanced Shaping calculator rather than reusing the pattern's spacing.
Yardage and weight. The finished garment uses fewer yards but weighs more. If the pattern pushes drape to its limit (a long open cardigan), the extra weight can add length as the garment hangs — consider knitting the body slightly shorter.
Going the other way
The identical process converts worsted patterns down to DK, or between any two weights — the ratio just flips above or below 1. For typical gauges by weight, see the worsted weight gauge chart, and for choosing a substitute yarn in the first place, see how to substitute yarn using gauge.