Gauge & Stitch
Crochet Gauge Calculator
Turn your gauge swatch into exact numbers: how many stitches to start with and how many rows to work for any finished size, in inches or centimeters.
Interactive Gauge Calculator
1
Tension BaseYour Test Swatch
Count full V-tops
sts
Standard: 4"
inches
Vertical height lines
rows
Standard: 4"
inches
Calculated Density:4.00 sts / 3.00 rows per inches
2
Project GoalTarget Finished Size
inches
inches
Quick Standard Presets (inches):
Visual Gauge Swatch Preview4×4 inches
16 Stitches × 12 Rows
Yields 16.0 sts / 12.0 rows in standard 4"
Calculated Blueprint & Cast-On Requirements
Foundation Cast-On
144stitches
Chain or foundation stitch to reach 36 inches
Total Rows to Work
144rows
Work until project measures 48 inches
Stitches per Inch
4.00sts/inches
Standard gauge: 16.0 sts in 4"
Rows per Inch
3.00rows/inches
Standard gauge: 12.0 rows in 4"
Golden Gauge Rule: Always measure the center of your swatch, never along edge stitches which curl and distort. If your swatch has more stitches per inch than your pattern specifies, your tension is tighter—go up 0.5mm in hook size. If it has fewer stitches, go down 0.5mm.
How to use the gauge calculator
- Row 1Make a swatch about 6 inches (15 cm) square in your project's yarn, hook and stitch, and block it the way you'll block the finished piece.
- Row 2Count the stitches and rows across the middle of the swatch, and measure the width and height you counted over.
- Row 3Enter those four numbers in the "Your Test Swatch" section.
- Row 4Enter the finished width and length you want, or tap a preset such as a beanie, baby blanket or scarf.
- Row 5Read your foundation stitch count and total rows in the results, along with your gauge per inch and per 4 inches (10 cm).
What this calculator works out
Every crocheter's stitches are a slightly different size, so a pattern's stitch counts only produce the stated size if your gauge matches the designer's. This calculator skips that guesswork. It measures your stitches from your swatch and scales them to the size you want.
You get four numbers:
- Foundation stitches: how many stitches wide to make your piece.
- Total rows: how many rows to reach the length you want.
- Stitches and rows per inch (or cm): your exact gauge.
- Gauge per 4 inches (10 cm): the format patterns use, so you can compare your swatch with a pattern at a glance.
Worked example
Your swatch has 16 stitches and 12 rows across a 4 × 4 inch square. You want a baby blanket 36 inches wide and 48 inches long.
- Stitches per inch: 16 ÷ 4 = 4
- Rows per inch: 12 ÷ 4 = 3
- Foundation stitches: 36 × 4 = 144 stitches
- Total rows: 48 × 3 = 144 rows
If your pattern uses a stitch repeat, for example a multiple of 4 plus 1, adjust 144 to the nearest number that fits. The stitch count calculator does that rounding for you, and the chain calculator adds the right number of turning chains.
Getting numbers you can trust
The result can only be as accurate as your swatch:
- Measure the middle, not the edges. Edge stitches are distorted by turning chains.
- Include half stitches. 15½ stitches over 4 inches is not the same as 16 once you multiply it across a whole blanket.
- Block the swatch first if you'll block the finished project. Many yarns relax and grow after washing.
- Swatch in the real stitch pattern. Single crochet and a shell stitch give very different gauges with the same yarn.
For the full story on why gauge matters, read our guide to crochet gauge.
The formula
Stitches per inch = swatch stitches ÷ swatch width. Foundation stitches = finished width × stitches per inch. Rows per inch = swatch rows ÷ swatch height. Total rows = finished length × rows per inch. Results are rounded to whole stitches.
Tips
- If your swatch has more stitches than the pattern's gauge, try a larger hook; fewer stitches, try a smaller hook.
- Swatch with the hook you'll actually use. Hooks of the same size in different materials can give different gauges.
- Measure the swatch in two or three places and use the average.
- For garments, match the stitch gauge (width) first. Length can often be adjusted by adding or removing rows.
Crochet Gauge Calculator FAQ
About 6 inches (15 cm) square, so you can measure 4 inches in the middle away from the distorted edges.
In-depth guides
- Crochet Basics8 min read
What Is Crochet Gauge? How to Measure It and Why It Matters
Gauge is the translation key between the designer's hands and yours. Learn how to make a swatch that tells the truth, measure it, match the pattern, and use the math to size any project.
Read guide 
Crochet Basics8 min readHow to Read a Crochet Pattern: The Complete Guide
Every part of a crochet pattern explained, from skill levels and multiple sizes to repeats, stitch counts, shaping language, charts and schematics, plus what to do when something seems wrong.
Read guide
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