What This Calculator Does
The Crochet Foundation Chain Calculator tells you exactly how many chain stitches to make before you start a row of crochet. Instead of guessing — and ending up with a piece that's too wide or too narrow — you enter the finished width you want, your gauge (stitches per inch), and any extra turning chains your stitch pattern requires. The tool returns the total number of foundation chains to crochet.
How to Use It
Make a quick gauge swatch first: crochet a small square, then count how many stitches fit in one inch — that's your stitches per inch. Measure or decide your desired width in inches. Add the turning/edge chains your pattern calls for (often 1 for single crochet, 2 for half double, 3 for double crochet). Hit calculate and chain that many stitches.
The Formula Explained
The math is simple: $$\text{chains} = \operatorname{round}\!\left(\text{desired width} \times \text{stitches per inch}\right) + \text{edge chains}$$ Multiplying width by gauge gives the number of working stitches your fabric needs to reach that width. We round to the nearest whole stitch (you can't make a fraction of a chain), then add the turning chains that lift your hook to the correct height for the first stitch.
Worked Example
You want a scarf 8 inches wide, your gauge is 4 stitches per inch, and you're working in double crochet (3 turning chains). Working stitches = \(8 \times 4 = 32\). Add 3 turning chains = 35 foundation chains. Chain 35 and you're ready to work your first row.
FAQ
What is gauge? Gauge is how many stitches fit in a given measurement, usually one inch. It depends on your yarn, hook size, and tension, so always swatch.
How many turning chains should I add? A common guide: single crochet 1, half double crochet 2, double crochet 3, treble crochet 4. Always check your specific pattern.
Why round the stitches? Fabric is made of whole stitches, so we round \(\text{width} \times \text{gauge}\) to the nearest whole number before adding edge chains.
