Home › Guides › Crochet Gauge Swatch: How to Make, Measure and Adjust It
Crochet Gauge Swatch: How to Make, Measure and Adjust It
Gauge is how many stitches and rows fit in 4 inches (10 cm). Crochet a swatch of at least 6 by 6 inches in the pattern stitch, wash or block it like the finished item, count the stitches in the middle 4 inches, and change hook size until your numbers match the pattern.
Updated:
- Standard gauge area: 4 × 4 in (10 × 10 cm); make the swatch about 6 in (15 cm) so you measure away from the edges.
- Too many stitches in 4 in means your stitches are too small: use a larger hook. Too few: use a smaller hook.
- Gauge is called tension in UK patterns.
- To resize a project: stitches needed = desired width × stitches per inch, rounded to the pattern's stitch multiple.
- Gauge matters most for garments, hats and anything that must fit; for blankets and scarves it mainly affects size and yarn amount.
Why gauge matters
Two people using the same yarn and hook can get different-sized fabric because of tension. Small differences add up fast: if a pattern expects 4 stitches per inch and you get 4.5, a 40 in sweater chest comes out about 35.5 in. That is a whole size smaller.
Gauge also affects yarn quantity and fabric feel. A swatch tells you all three before you invest hours in the project.
How to read a gauge statement
Patterns write gauge like this:
16 sts and 18 rows = 4 in (10 cm) in sc with 5 mm hook, after blocking.
- 16 sts: 16 stitches across 4 inches, which is 4 stitches per inch.
- 18 rows: 18 rows in 4 inches of height.
- in sc: measured in the stitch named, here single crochet. If the pattern names a stitch pattern, swatch in that pattern.
- after blocking: wash or wet the swatch first, as you will the finished item.
Some patterns give gauge as a number of pattern repeats or as a measured motif, such as “one granny square = 5 in”.
Adjusting gauge: hook size first
| Your swatch | Meaning | Fix |
|---|---|---|
| More stitches than pattern | Your stitches are smaller | Go up a hook size |
| Fewer stitches than pattern | Your stitches are bigger | Go down a hook size |
| Stitches match, rows don't | Stitch height differs | Follow measurements in inches instead of row counts, or adjust how high you pull up loops |
Stitch gauge (width) is usually more important than row gauge, because most patterns tell you to work until a piece measures a certain length. Make a new swatch after each hook change; do not guess.
Recalculating stitch counts for your gauge
If you cannot match gauge, or you are designing your own piece, calculate with your actual gauge:
- Stitches per inch = stitches in 4 in ÷ 4. Example: 14 ÷ 4 = 3.5.
- Stitches needed = desired width × stitches per inch. Example: 20 in × 3.5 = 70.
- Round to the stitch multiple of your pattern. If the stitch pattern repeats over 4 stitches plus 2, choose 70 (4 × 17 + 2).
- Add the foundation chain for your stitch: for single crochet, chain 1 more than the number of stitches.
Rows work the same way with rows per inch, or simply measure as you go.
Gauge for hats, amigurumi and blankets
- Hats: measure the head, subtract about 1 to 2 in (2.5 to 5 cm) for a snug fit, and compare to the crown circle. A swatch or the first few rounds of the crown tell you if you are on track.
- Amigurumi: gauge rarely has to match exactly, but tight stitches are important so the stuffing does not show. Use a smaller hook if you can see gaps.
- Blankets and scarves: size is flexible, but your gauge changes how much yarn you need. A looser gauge uses more yarn per finished inch than you might expect, so buy extra or swatch first.
Step by step
- Use the project yarn and hook. Use the exact yarn you will use for the project and the hook named in the pattern. Different colors of the same yarn can even behave slightly differently.
- Chain enough for 6 inches. Chain enough stitches for about 6 in (15 cm) of width, following the stitch multiple of the pattern stitch if it has one.
- Work the pattern stitch. Crochet in the stitch named in the gauge statement until the swatch is about 6 in (15 cm) tall. Relax and crochet the way you normally do.
- Block the swatch. Wash or wet the swatch the same way you will treat the finished item, pat it into shape and let it dry flat without stretching.
- Measure stitches. Lay a ruler across the middle of the swatch, away from the edges. Count the stitches within 4 in (10 cm), including half stitches.
- Measure rows. Turn the ruler vertically and count the rows within 4 in (10 cm), again in the middle of the swatch.
- Compare and adjust. If you have more stitches than the pattern, make a new swatch with a larger hook; if fewer, use a smaller hook. Repeat until the stitch count matches.
- Write it down. Note the hook size and your final gauge. If you could not match it, use the numbers to recalculate stitch counts before you start.
Yarny's stitch (gauge) calculator turns your swatch measurements into stitch counts for the size you want, so you don't have to do the math by hand.
Frequently asked questions
Do I really need to make a gauge swatch?
For anything that must fit, like sweaters, hats and socks, yes. For blankets, scarves and most amigurumi, a swatch is optional, though it still helps you predict size and yarn amount.
How big should a crochet gauge swatch be?
At least 6 by 6 in (15 by 15 cm) so you can measure 4 in in the middle. Edge stitches are often uneven and give a wrong reading if you measure across the whole swatch.
What if I match stitch gauge but not row gauge?
Prioritize stitch gauge. Most patterns tell you to work to a measurement, so row differences can be handled by measuring as you go. If rows are given as counts, add or remove rows evenly to reach the stated length.
Why does my gauge change during a project?
Tension often changes with mood, fatigue, and how relaxed you are, and many people crochet tighter at the start. Measure the project every so often and compare with your swatch.
What is tension in a UK crochet pattern?
Tension is the UK word for gauge. It means the same thing: the number of stitches and rows in a 10 cm (4 in) square.