How do I measure yarn for intarsia?

Calculate the total stitches in the colour block (stitches x rows), then multiply by the approximate yarn per stitch (which depends on gauge). Add 15-20% extra for tail ends and any adjustments. Wind each colour onto a bobbin or butterfly.

How is intarsia different from Fair Isle?

In intarsia, each colour block uses a separate length of yarn with no carrying across the back. Where colours meet, the yarns are twisted together to prevent gaps. In Fair Isle, the unused colour is carried as a float across the back of the work. Intarsia is used for large colour blocks; Fair Isle for small, repeating patterns.

How do I prevent holes at colour changes?

Always twist the two yarns at the colour change: bring the new colour up from under the old colour. This interlocks the stitches at the boundary. Consistent twisting direction prevents gaps without creating bulk.

KnitCalcs

Intarsia Calculator — Yarn Lengths for Colour Blocks

Calculate the yarn length needed for each colour block in intarsia knitting.

Block Width

Block Height

Stitch Gauge (per 10cm)

Row Gauge (per 10cm)

How We Calculate This

This calculator estimates yarn length for an intarsia colour block based on the number of stitches, gauge, and a standard yarn consumption per stitch.

The formula

Total stitches = Block stitches x Block rows

Yarn per stitch ≈ (10 / stitch gauge) + 0.3cm

Yarn length = Total stitches x Yarn per stitch x 1.15 (15% extra)

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.