Crochet Stitch Calculator
Your swatch, turned into every number a pattern asks for — stitches per inch, starting chains, row counts, and fixes when the designer's gauge isn't yours.
1 · Measure your swatch
2 · Your gauge
Stitches / in
3.56
per inch
Stitches / cm
1.4
per cm
Rows / in
3.81
per inch
Rows / cm
1.5
per cm
= 14.2 sts × 15.2 rows per 4 in · 14 sts × 15 rows per 10 cm
3 · Starting chain & row counts
Chain
42 sts
for 30 cm wide · round to your stitch repeat
Work
60 rows
for 40 cm tall
No swatch yet? Estimate rows by stitch height
Defaults are worsted-weight averages (sc ≈ 1.0, hdc ≈ 1.3, dc ≈ 1.7, tr ≈ 2.0 cm per row) — measure one row of your own yarn and adjust for precision.
4 · Pattern says one gauge, you get another
Enter the pattern's gauge (per 10 cm) — yours comes from the swatch above.
Scale factor (pattern ÷ yours)
× 1
pattern 14 sts vs your 14 sts per 10 cm
You chain instead
100 sts
You work instead
60 rows
All math runs in your browser from the numbers you enter — nothing is uploaded. Swatches lie unless they're blocked: wash and dry yours the way you'll treat the finished piece. 💕
Keep planning: how much yarn you'll need · hook & needle sizes · knitting version · turn a photo into a chart
Crochet has no ball-band shortcut: the same worsted yarn can give you 12 or 18 single crochet per 4 inches depending on your hands. This crochet calculator starts where the truth lives — your swatch — and turns it into stitches and rows per inch or cm, the starting chain for any width, and corrected counts when a pattern's gauge doesn't match yours.
There's also a shortcut nobody else builds in: a crochet gauge calculator that estimates rows from stitch height. Pick sc, hdc, dc or tr and it converts centimeters of fabric into rows using typical per-row heights (about 1.0, 1.3, 1.7 and 2.0 cm in worsted) — adjustable to your own yarn. Handy for planning before the swatch exists, and a sanity check after it does.
What you get
Swatch-first, not form-first
Stitch and row counts sit on a drawn swatch with a 10 cm / 4 in badge — measure, type, done.
Stitch-height row estimates
sc, hdc, dc and tr row-height coefficients turn target centimeters into row counts — defaults are worsted averages, and every value is adjustable.
Starting chains for any width
Target a width, get the foundation chain. Target a height, get the rows — from your swatch or from the stitch-height estimate.
Gauge mismatch fixer
Pattern gauge vs. yours → scale factor and adjusted stitch and row counts, before you've chained a stitch of the real project.
cm and inches, both
One toggle converts your swatch measurements; gauge is always shown per inch and per cm side by side.
Free, private, no sign-up
Everything computes in your browser — nothing is uploaded, nothing is tracked.
How to calculate crochet stitch counts
Swatch in the pattern stitch
Chain about 20 and work a square at least 10 cm / 4 in across in the stitch the pattern uses — sc and dc gauge differently, so swatch the real stitch. Block it if the finished piece will be blocked.
Count, measure, enter
Count stitches across a row and rows up the middle, measure the width and height they span, and enter the four numbers on the swatch above. Your gauge appears per inch and per cm.
Chain, count, or correct
Get the starting chain for your target width, the rows for your target height (swatch-based or stitch-height-based), and the adjusted counts if the pattern's gauge isn't yours.
Stitch math by calculator vs. by vibes
| Stitch calculator | Chain and hope | |
|---|---|---|
| Starting chains | Computed from your swatch, for your exact target width | Chain 150-ish and see how it drapes |
| Row planning | Swatch-based and stitch-height estimates side by side | Counting rows on someone else's photo |
| Wrong gauge | Scale factor and corrected counts before you start | A blanket that fits the bed in a different house |
| Unit juggling | cm and inches shown together, converted automatically | A calculator app, a converter tab, and a sticky note |
Frequently asked questions
What is gauge in crochet?
Gauge is the number of stitches and rows that fit into a set distance — typically "14 sc and 15 rows = 4 inches". It's how a pattern converts stitch counts into real-world centimeters. Because crochet tension varies hugely between makers, the same pattern at a different gauge produces a genuinely different object, which is why patterns beg you to swatch.
How do I calculate how many chains to start with?
Work a small swatch, find your stitches per inch (the calculator above does this), then multiply by your target width: 3.5 sc per inch × 36 inches = 126 stitches, so chain 127 (one extra for the turning chain in sc — add two for hdc, three for dc). Round to your stitch pattern's multiple if the pattern has one.
How many rows of single crochet make 10 cm?
In worsted weight at average tension, about 10 rows — single crochet runs close to 1 cm per row. Half double crochet gives roughly 7–8 rows, double crochet about 6, and treble about 5. Your hands will differ, which is why the stitch-height estimator above lets you adjust the per-row value.
How do I adjust a crochet pattern if my gauge is different?
Divide the pattern's stitch gauge by yours for the scale factor, then multiply the pattern's stitch counts by the inverse. Pattern says 14 sc per 4 in and you get 16: factor ×0.875, and a 140-stitch pattern row becomes 160 at your gauge. For garments, changing hook size to match gauge is usually easier than rewriting every count.
Why is my crochet gauge different from the pattern's?
Tension is personal — how you hold the yarn, whether you lift loops tall or ride them low, even your mood. Hook material matters too: grippy bamboo tends tighter than slick steel. This is normal and expected; the gauge swatch exists so you can adjust hook size or stitch counts before it matters.
Is this crochet stitch calculator free?
Yes — free with no sign-up, and it runs entirely in your browser. Your swatch numbers never leave your device.