4 min read

Guide

Yarn Substitution: How to Swap Yarn in a Knitting Pattern

Short answer

You can knit a pattern with a different yarn if it has the same weight category, similar yardage per 3.5 oz / 100 g (within about 10%) and, above all, if it gives you the same gauge as the pattern. Work out how much to buy by total yardage, not by number of skeins: multiply the pattern's skeins by their yardage and divide by the yardage of your skein.

The 5 checks

What to compareWhere to find itWhy it matters
Weight category (0–7)Ball band or yarn weight chartThe first filter: super bulky for super bulky
Yardage per 3.5 ozBall band: yards ÷ ounces × 3.5Tells you how thick or airy the strand is
GaugeYour washed swatch vs the pattern's gaugeThe final proof that the size will come out right
FiberFiber contentChanges drape, weight and stretch
ConstructionPlied, roving, chenille, tapeChanges stitch definition and texture

How to knit and measure a swatch: knitting gauge swatch.

How many skeins to buy

  1. Total yardage in the pattern = skeins called for × yards per skein.
  2. Skeins of your yarn = total yardage ÷ yards in your skein. Round up.
  3. Add one skein if your gauge came out looser or you are lengthening the garment.

Example: a pattern calls for 7 skeins of 3.5 oz / 98 yd, which is 686 yd. With FACES (7 oz / 109 yd) you need 686 ÷ 109 = 6.3, so 7 skeins. Another: 10 balls of 1.75 oz / 65 yd make 650 yd; with BeMe (3.5 oz / 131 yd), that is 5 skeins.

Yardage of our yarns

YarnSkeinYards per 3.5 ozStockinette gauge
FACES7 oz / 109 ydabout 55 yd6–6.5 sts per 4 in, US 19 needles
BeMe3.5 oz / 131 yd131 yd12 sts per 4 in, US 11 needles
NOVA1.75 oz / 164 ydabout 328 yd6 sts per 4 in, US 17 needles

NOVA shows why gauge rules: it has a lot of yardage per ounce, but it is a light, airy strand knitted on US 17 needles. Yardage alone is not enough.

What changes when you change fiber

  • Wool for acrylic: wool is warmer, breathes and recovers its shape better; acrylic tends to pill more and lose loft with wear.
  • Wool for cotton: cotton is heavier and has almost no stretch; ribbing at cuffs and neck loses grip and the garment drops more.
  • Plied wool for chenille or unspun roving: chenille hides stitch definition and roving pills; best kept for simple blankets.
  • Merino for Highland: Highland has a slightly thicker fiber, is springier and shows stitches more clearly. We compare them in Highland wool vs merino.
  • Paper raffia for viscose raffia: paper raffia is stiffer; a bag designed for one will turn out differently with the other.

Holding yarn double

Two strands held together roughly give you the next weight category up: two strands of a bulky yarn come close to super bulky. Always swatch, because the result depends on the yarn, and remember you will use twice the yardage. More in chunky vs bulky vs super bulky yarn.

FAQ

Can I use any yarn of the same weight?
It is the starting point, but not enough: within one category some yarns are finer and some thicker. Gauge decides.

Should I calculate by weight or by yardage?
Always by yardage. Two yarns of the same weight can have very different yardage.

Can I knit your patterns with another yarn?
Yes, if you match the gauge. They are written for our yarns, so with them the size comes out right the first time.

What if I run out of a skein halfway through?
Look for the same dye lot. If there is none, alternate two rows from each skein for 4–6 in to blend the color difference.

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