How much do cables narrow the fabric?

Cables typically reduce fabric width by 10-15% of the cabled area. A 6-stitch cable might narrow the fabric by about 1cm compared to the same 6 stitches in stockinette. The exact amount depends on cable crossing frequency and tension.

How much extra yarn do cables use?

Cables use approximately 10-20% more yarn than stockinette stitch for the cabled area. The extra yarn is needed because the crossing stitches travel a longer path. Wider cables and more frequent crossings use proportionally more yarn.

Should I change needle size for a cable section?

Some knitters go up a half needle size for the cable section to compensate for the tighter tension that cables create. However, most patterns are designed with this in mind. Always swatch with cables to check your gauge.

KnitCalcs

Cable Stitch Calculator — Width & Yarn Impact

Calculate how cables affect fabric width and yarn consumption.

Cable Width

Stitches per cable (e.g. C6F = 6)

Number of Cables

Total Stitches

Stitch Gauge (per 10cm)

How We Calculate This

Cables pull fabric narrower because stitches cross over each other. This calculator estimates the width reduction and extra yarn consumption.

The formula

Width reduction = Cable area width x 12% (average cable contraction)

Extra yarn = (Cable stitches / Total stitches) x 15%

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates based on standard yarn weights and gauge. Results may vary with individual tension, yarn brand, and needle size.