Knitting Gauge and Cast-On Calculator
Fill in the values and the answer updates as you type.
How the Knitting Gauge and Cast-On Calculator works
Gauge = stitches (or rows) in the swatch ÷ swatch size. Cast-on = target width × stitches per inch, and rows = target length × rows per inch. Wash and block the swatch first, since many yarns change size after washing. Round the cast-on to your stitch pattern multiple. Example: with Stitches in swatch 20, Rows in swatch 28, and Swatch size (square) 4 in, the result is Stitches to cast on = 200; Rows to knit = 168; Stitches per inch = 5.
Inputs and results
The Knitting Gauge and Cast-On Calculator takes 5 inputs and gives 4 results.
What you enter
- Stitches in swatch — starts at 20.
- Rows in swatch — starts at 28.
- Swatch size (square) (in) — starts at 4.
- Target width (in) — starts at 40.
- Target length (in) — starts at 24.
What you get
- Stitches to cast on
- Rows to knit
- Stitches per inch
- Rows per inch
Example: Knitting Gauge and Cast-On Calculator with the starting values
With stitches in swatch 20, rows in swatch 28, swatch size (square) 4 in, target width 40 in and target length 24 in, the calculator returns:
| Stitches to cast on | 200 |
|---|---|
| Rows to knit | 168 |
| Stitches per inch | 5 |
| Rows per inch | 7 |
Change any value above and the results update straight away.
Knitting Gauge and Cast-On Calculator FAQ
How do I use the Knitting Gauge and Cast-On Calculator?
Enter stitches in swatch, rows in swatch, swatch size (square) and target width in the fields, then read stitches to cast on, rows to knit, stitches per inch and rows per inch in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Knitting Gauge and Cast-On Calculator calculate?
Stitches to cast on and rows to knit from your gauge swatch. It returns stitches to cast on, rows to knit, stitches per inch and rows per inch from the 5 values you provide.
What values does the Knitting Gauge and Cast-On Calculator start with?
It opens with stitches in swatch 20, rows in swatch 28, swatch size (square) 4 in and target width 40 in so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Knitting Gauge and Cast-On Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Knitting Gauge and Cast-On Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.