Calculate a rounded cast-on count from width and measured gauge, with an optional whole stitch multiple; add pattern offsets separately.
What is this?
A planning calculator that converts target width and measured gauge to a whole stitch count, with optional rounding up to a repeat multiple.
Who needs it?
Knitters comparing cast-on counts for a custom width or a different measured gauge.
Bottom line
Enter your measured gauge and desired width to calculate how many stitches to cast on, rounded to your pattern repeat.
Enter your desired width and measured gauge for a planning stitch count. Without a multiple, the count rounds to the nearest whole stitch; with a multiple, it rounds up from the unrounded count.
Example Project Widths
Project
Illustrative Target Width
Scarf
6–8 inches
Cowl (circumference)
24–30 inches
Baby Blanket
30–36 inches
Throw Blanket
50 inches
Dishcloth
8–9 inches
Pillow Cover
16–20 inches
Cast On Tips
Always swatch first. Your actual gauge may differ from the yarn label recommendation.
Edge stitches are extra stitches (usually 1 or 2 per side) that create a neat selvedge for seaming or picking up stitches.
Stitch multiples ensure your pattern repeat fits evenly. For example, a 4-stitch rib needs a multiple of 4.
Finishing can change width. Base the cast-on on a representative swatch treated under the pattern and product care instructions.
Formula and calculation method
Raw count = desired width in inches × gauge stitches / gauge span in inches. With no multiple, the count rounds to the nearest whole stitch. With a multiple, it rounds the raw count upward to a complete multiple. The modeled width uses the rounded count.
Worked example
A width of 12.2 inches at 4 stitches per 4 inches gives a raw count of 12.2. With a multiple of 6, the next complete multiple is 18 stitches; at that gauge its modeled width is 18 inches.
Assumptions and limitations
!Pattern offsets, selvedges, ease, and turning chains are not included. Follow the pattern for these adjustments.
!A complete multiple may increase modeled width substantially. Check that width before casting on.
!Use measured gauge from the intended stitch pattern and finishing treatment; this arithmetic does not guarantee fit.
References
The arithmetic uses your measured gauge. For the measurement method, see the Craft Yarn Council gauge instructions. Pattern offsets, edges, construction, and finishing still require the selected pattern’s instructions.
Frequently Asked Questions
How is the cast-on count calculated?
Desired width × measured gauge stitches / measured gauge span, with all dimensions in inches.
How does rounding work?
With no multiple, the tool rounds to the nearest whole stitch. With a multiple, it rounds the raw count upward to a complete multiple and displays the resulting modeled width.
Does it add edge stitches or a pattern offset?
No. The multiple field does not add an offset such as the +2 in a 6n+2 pattern. Follow the pattern and account for its edges and offsets separately.
Does the count guarantee fit?
No. Use a representative swatch and the intended stitch pattern, construction, and finishing. Recheck gauge while working.
Next step
Compare your swatch with the pattern gauge or calculate the stitch count for a finished width.
Pair the calculated stitch count with needles, markers, and yarn that match the pattern gauge.
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