Welcome to the beginner guide. When you're ready, explore our free knitting tools to calculate your next project.
How to Measure Knitting & Crochet Gauge
Gauge is the single most important step most crafters skip. This guide explains what gauge is, how to measure it accurately, and exactly what to do when your numbers don't match the pattern.
What is Gauge?
Gauge (also called tension in UK patterns) is a measurement of how many stitches and rows fit into a specific area of fabric — usually 4 inches or 10 cm square. Every pattern is written assuming you'll produce a specific gauge. If yours is different, your finished project will come out a different size than intended.
A gauge note in a pattern looks like this: "20 sts and 28 rows = 4 inches in stockinette on US 7 needles." This tells you the designer got 20 stitches across and 28 rows down when they measured a 4-inch square of their knitting.
If you knit more stitches per inch than the pattern (tighter tension), your project will come out smaller. If you knit fewer stitches per inch (looser tension), it will come out larger. For a sweater, being off by even half a stitch per inch can mean a difference of 2-3 inches in the finished chest measurement.
Need to convert your pattern numbers? Use our Gauge Calculator.
What You Need Before You Start
- Your yarn (the exact yarn you'll use for the project)
- Your needles or hook (same size as pattern specifies)
- A ruler or tape measure
- A pen or two pins (to mark measurements)
- 15-20 minutes
If you need to check yarn compatibility, try our Yarn Substitution Calculator.
How to Make Your Gauge Swatch
Cast on at least 20-30 stitches (knitting) or chain 20-25 (crochet). You need a swatch at least 6 inches wide — wider than the 4 inches you'll measure, because edge stitches are always uneven and will skew your count.
Work in the same stitch the pattern uses. If your pattern is in stockinette, work stockinette. If it's in double crochet, work double crochet. Different stitches produce completely different gauges even with the same yarn and needle size.
Work until your swatch is at least 6 inches tall — again, taller than the 4 inches you'll measure. Cast off or fasten off.
This is the step most people skip — and it's the most important one. Wash and block your swatch exactly the way you plan to care for the finished project. Yarn can change dramatically after washing — wool often relaxes and grows, acrylic stays almost the same, cotton can shrink slightly.
Let the swatch dry completely before measuring. Measuring a wet or damp swatch gives inaccurate results.
If you're making a crochet project, don't forget to check our Crochet Gauge Tool for specific hook advice.
How to Measure Your Swatch
Place your blocked swatch on a flat surface without stretching it. Don't hold it up or measure it while it hangs — gravity will distort the measurement.
Lay your ruler or tape measure across the CENTER of the swatch horizontally. Don't measure from edge to edge.
Place a pin or mark at any point, then count how many stitches fit across the next 4 inches. Count half stitches too — if you count 20.5 stitches, record 20.5, not 20. This precision matters.
Rotate your ruler vertically and count how many rows fit within 4 inches, measured in the center of the swatch.
You now have your stitch gauge (e.g. 22 stitches per 4 inches) and your row gauge (e.g. 30 rows per 4 inches). These are the numbers you'll enter into the gauge calculator.
Measured your gauge? Enter your numbers into our free gauge calculator to instantly convert your entire pattern.
Open Gauge Calculator →Common Mistakes (and How to Fix Them)
For more detailed yarn and fiber differences, visit our Yarn Substitution Guide.
What To Do When Your Gauge Doesn't Match
Your gauge is too tight
You're getting MORE stitches per inch than the pattern. Try going up one needle/hook size and swatching again.
Your gauge is too loose
You're getting FEWER stitches per inch than the pattern. Try going down one needle/hook size and swatching again.
Your gauge is close but not exact
If you can't match gauge by changing needle size, use our pattern scaler to mathematically adjust every stitch count in your pattern to match your actual gauge.
Use Pattern Scaler →For fitted garments, always try to match gauge exactly before starting. For accessories, being within half a stitch per inch is usually acceptable. Alternatively, you can always scale the pattern using our Gauge Calculator.
How to Adjust a Raglan Knitting Pattern
Raglan sweaters are one of the most popular construction types for hand knitters — worked from the top down or bottom up, they have distinctive diagonal seam lines running from neck to underarm. Adjusting a raglan for a different gauge requires understanding which parts of the pattern scale simply and which parts need separate recalculation.
Why Raglan is Different From Straight Knitting
A straight sweater worked top-down or bottom-up scales proportionally — every stitch count and row count can be multiplied by the same gauge ratio. Raglan construction adds a complication: the diagonal raglan lines are shaped by increase or decrease rows worked at specific intervals. The angle of that diagonal depends on BOTH your stitch gauge and your row gauge simultaneously. If your stitch gauge changed by 10% but your row gauge only changed by 5%, the raglan angle will be different in your version than in the original — even if every other measurement is correct.
Parts of a Raglan You Can Scale Directly
Not everything in a raglan pattern requires complex math. These sections scale the same way as any straight knitting:
- Body circumference (stitch measurement — multiply by stitch multiplier)
- Body length below underarm (row measurement — multiply by row multiplier)
- Sleeve length below underarm (row measurement)
- Cuff circumference (stitch measurement)
- Neck circumference (stitch measurement)
- Sleeve width at underarm (stitch measurement)
For these measurements, use our Pattern Size Calculator which handles proportional scaling for straight sections.
Open Pattern Size Calculator →Parts of a Raglan That Need Special Attention
These sections of a raglan pattern cannot be scaled with simple multiplication:
Recommended Process for Adjusting a Raglan
Calculate your gauge multipliers using the Gauge Calculator. Note both your stitch multiplier AND your row multiplier separately — you will use both.
Scale your finished measurements first (chest, body length, sleeve length, neck width) using the Pattern Size Calculator.
Convert your scaled measurements back to stitch and row counts using your gauge:
stitches = measurement in inches × your stitches per inch.
rows = measurement in inches × your rows per inch.
Recalculate your total raglan increases from your new stitch counts:
total increases per seam = (chest sts - neck sts) ÷ 8.
(Dividing by 8 accounts for 4 seam lines × 2 increases per seam per increase row.)
Determine your increase frequency:
increase rows needed = total increases per seam.
Total raglan rows available = raglan depth × your rows per inch.
Increase every X rows where X = total raglan rows ÷ increase rows needed, rounded to nearest whole number.
Swatch again after your first few inches of yoke to confirm the diagonal angle looks right before committing to the full yoke.
Quick Raglan Math Reference
| What to calculate | Formula |
|---|---|
| Chest stitch count | your chest inches × your stitches per inch |
| Neck stitch count | your neck inches × your stitches per inch |
| Total increases per seam | (chest sts - neck sts) ÷ 8 |
| Raglan rows available | raglan depth inches × your rows per inch |
| Increase every X rows | raglan rows ÷ increases per seam (round to whole number) |
| Sleeve underarm hold | sleeve sts ÷ 2 (approx, adjust to pattern) |
Raglan adjustment is one of the more involved gauge calculations in knitting, but it follows a logical process once you break it into steps. The key insight is treating the yoke as a geometry problem: you're controlling the angle of four diagonal lines simultaneously.
Ready to start scaling? Enter your gauge numbers and get your multipliers first.
Calculate My Gauge Multipliers →Quick Gauge Checker
Enter your numbers and see instantly if your gauge matches your pattern.