A crochet gauge to hook size chart maps stitch-per-inch gauge to the recommended hook size for each yarn weight. Because crochet tension varies between crafters, this chart gives you a starting point — always crochet a test swatch to confirm your actual gauge before starting a sized project.
Gauge Lookup
Enter your stitches per 4 inches to find the matching hook size
Complete Crochet Hook Size Chart
Gauge = stitches per 4 inches in single crochet with average tension
| Yarn Weight | Gauge (sts / 4 in) | US Hook | Metric (mm) |
|---|---|---|---|
| Thread / Lace (0) | 32–42 | B/1 – 6/0 | 0.75 – 2.25 |
| Fingering / Sock (1) | 24–32 | B/1 – D/3 | 2.25 – 3.25 |
| Sport / Baby (2) | 20–24 | D/3 – F/5 | 3.25 – 3.75 |
| DK / Light Worsted (3) | 16–20 | F/5 – G/6 | 3.75 – 4.25 |
| Worsted / Aran (4) | 12–16 | G/6 – J/10 | 4.0 – 6.0 |
| Bulky (5) | 9–12 | J/10 – M/13 | 6.0 – 9.0 |
| Super Bulky (6) | 5–9 | M/13 – Q | 9.0 – 16 |
| Jumbo (7) | 1–5 | Q + | 16 + |
How to Use the Crochet Gauge to Hook Size Chart
Crochet hook size and yarn weight together determine your gauge — the number of stitches per 4 inches. The crochet gauge to hook size chart maps these relationships so you can quickly find what hook size typically produces a given gauge, or what gauge to expect from a specific yarn weight. Use the gauge lookup for a quick recommendation, then verify with a physical test swatch.
Step 1: Enter your gauge or read the chart
If you know your stitch count from a swatch, enter it in the lookup box. The tool highlights the matching yarn weight category and hook size range. If you're starting from scratch and want to know what gauge worsted weight typically produces, scan the chart for the "Worsted / Aran" row — typically 12–16 stitches per 4 inches with a G/6 to J/10 hook.
Step 2: Understand US vs. metric hook sizing
US crochet hook sizes use letter-number codes (B/1, G/6, J/10). These can vary slightly between brands — some manufacturers have slight differences in their G/6 hooks. The metric millimetre size stamped on the hook shaft is always the most reliable measurement. When in doubt, measure the hook with a needle gauge or calipers.
Step 3: Always swatch first
The chart gives starting points — your personal tension may produce a different gauge. If you crochet tightly, go up one hook size. If you crochet loosely, go down one size. Swatch at least 5 × 5 inches and measure in the center (not the edges) for accuracy. For projects where fit matters (garments, bags with zippers), getting exact gauge is critical.
FAQ
Is this crochet gauge chart free?
Yes, completely free with no signup required. The full hook size chart and gauge lookup are available instantly.
Is my data safe and private?
Yes. This is a reference tool. Everything runs in your browser with no data collection.
What is crochet gauge?
Gauge is the number of stitches (and rows) that fit within a standard measurement — usually 4 inches (10 cm). It's determined by your hook size, yarn weight, and tension (how tightly or loosely you crochet). Gauge affects the final size of your project, so it's critical to check gauge before starting a fitted or sized project.
How do I measure my crochet gauge?
Crochet a swatch at least 5 inches wide × 5 inches tall in the stitch pattern you'll use. Lay it flat without stretching. Count the stitches within exactly 4 inches in the center of the swatch (not the edges). If you have fewer stitches than the pattern calls for, try a smaller hook. If you have more, try a larger hook.
What size crochet hook for worsted weight yarn?
Worsted weight yarn typically uses a US J/10 (6mm) hook. However, gauge is personal — if you crochet tightly, try a larger hook (US K/10.5 or L/11). If you crochet loosely, try a smaller hook (US I/9 or J/10). Always swatch to verify your gauge matches the pattern.
How do I convert US crochet hook sizes to metric mm?
Common conversions: US B/1 = 2.25mm, US E/4 = 3.5mm, US G/6 = 4mm, US I/9 = 5.5mm, US J/10 = 6mm, US K/10.5 = 6.5mm, US M/13 = 9mm. Always check the actual mm size stamped on your hook — US letter sizes can vary slightly between brands.