What is a standard blanket size?

Pram/crib: 70x90cm. Single/throw: 120x150cm. Double: 150x200cm. King: 200x230cm. Lap blanket: 90x120cm.

How much yarn for a blanket?

A throw (120x150cm) in aran weight uses approximately 1,250-1,450m. In chunky, roughly 1,200-1,350m. Super bulky: about 1,100-1,250m. Use the calculator above for your exact size and yarn weight — heavier yarns cover more area per metre, so a chunky or super-bulky throw generally needs fewer total metres than aran for the same blanket (though it weighs more in grams).

What is the best yarn weight for blankets?

Aran and chunky are most popular for blankets. Aran gives good drape and a reasonable knitting time. Chunky knits faster. Super bulky makes dramatic but heavy blankets.

KnitCalcs

Blanket Size Calculator — Calculate yarn and stitch counts for blankets and throws

Calculate yarn and stitch counts for blankets and throws.

Width

Finished blanket width before any border

Length

Finished blanket length before any border

Yarn WeightSelect the yarn weight category (sets a default row gauge you can override)

Stitch Gauge

Stitches per 10cm from your gauge swatch

Row Gauge

Rows per 10cm from your gauge swatch (defaults by yarn weight: DK ~28, Aran ~24, Chunky ~17, Super Bulky ~12)

How We Calculate This

This calculator estimates yarn from blanket area and yarn weight, and calculates cast-on stitches and rows from your gauge swatch.

The formula

Cast on = Width x (Stitch gauge / 10)

Total rows = Length x (Row gauge / 10)

Yarn = Area x Grams per cm² x Metres per gram

Row gauge is taken from your own swatch. Selecting a yarn weight sets a sensible default (DK ~28, Aran ~24, Chunky ~17, Super Bulky ~12 rows/10cm), which you can override, because row gauge — like stitch gauge — gets looser as the yarn gets thicker.

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.