Crochet Sphere Calculator
Crochet sphere calculator works out Stitches to chain or cast on and Rows to work from Standard size, Finished width and Finished length. The default figures on this page give yarn needed of 82.9 yards; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
5 steps
- Gauge: 14 stitches and 8 rows over 4 in, so 3.5 stitches and 2 rows per in.
- Work 12 rounds to reach a 12 in diameter, ending at 132 stitches around.
- Estimated from stitch count and yarn weight: about 75 yards before allowance.
- Adding 10% gives 83 yards.
- At 200 yards a skein, buy 1 skeins.
Circle increase plantable
| round | stitches | increases |
|---|---|---|
| 1 | 11 | 11 |
| 2 | 22 | 11 |
| 3 | 33 | 11 |
| 4 | 44 | 11 |
| 5 | 55 | 11 |
| 6 | 66 | 11 |
| 7 | 77 | 11 |
| 8 | 88 | 11 |
| 9 | 99 | 11 |
| 10 | 110 | 11 |
| 11 | 121 | 11 |
| 12 | 132 | 11 |
Its 5 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
3 sources
What the crochet sphere calculator calculates
Turns a gauge swatch into stitch and row counts for any finished size, and estimates the yarn needed in yards, metres, grams and skeins.
How to use this crochet sphere calculator
Enter Standard size, Finished width, Finished length and Finished diameter. Stitches to chain or cast on updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Stitches to chain or cast on, Rows to work and Total stitches in the project.
The method follows Craft Yarn Council, Standard Yarn Weight System, Craft Yarn Council, standard blanket and garment sizing charts and Yarn requirement scales with finished area against a measured swatch: yards = swatchYards x (projectArea / swatchArea)..
What you can compare
Change one input at a time to see how it affects Stitches to chain or cast on, Rows to work and Total stitches in the project. The inputs you can vary are Standard size, Finished width, Finished length, Finished diameter, Measurement unit and Stitches in the gauge swatch.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do I calculate the measurements of a sphere?
Turns a gauge swatch into stitch and row counts for any finished size, and estimates the yarn needed in yards, metres, grams and skeins. Open “How this is worked out” beside the result to see each step for your own figures.
How to crochet a tiny sphere?
It needs Standard size, Finished width, Finished length, Finished diameter, Measurement unit and Stitches in the gauge swatch. Nothing else is required, and the figures stay in your browser.
What information do I need for the crochet sphere calculator?
You need Standard size, Finished width, Finished length, Finished diameter, Measurement unit, Stitches in the gauge swatch, Rows in the gauge swatch and Gauge swatch measures. The page opens with default figures that give yarn needed of 82.9 yards, so you can see the scale before entering your own.
What does this crochet sphere calculator show?
It shows Stitches to chain or cast on, Rows to work, Total stitches in the project, Yarn needed, Skeins to buy, Finished width, Finished length and Finished area, with the working and any warnings for your entries.
Can I check how the crochet sphere calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.