Sweater Yarn Calculator

Estimate how much yarn your sweater needs — choose a garment type and size, pick your yarn weight, and get a yardage and skein estimate. Add your gauge for a tighter number on bigger projects.

1. Garment type
Size
Yarn weight
Craft
Refine with gauge (optional)
Stitches per inch
Rows per inch

Leave blank to use typical gauge for the selected weight. Gauge has a big effect on a garment this size.

Your estimate

1,100–1,700
Yards
1,006–1,554
Meters
6–9
Skeins
Worsted
Yarn weight

Estimate for a medium worsted-weight pullover. Skein counts assume a typical worsted skein (200 yds) — check your yarn’s label, as yards per skein vary by brand.

Average yarn by size

SizeTypical yardage (worsted)
XS1,000–1,300 yds
S1,100–1,500 yds
M1,300–1,800 yds
L1,500–2,100 yds
XL1,800–2,500 yds
XXL2,100–2,900 yds

Cardigans and hoodies sit toward the high end (button bands, hoods); vests use noticeably less. Finer yarns increase yardage.

Frequently asked questions

How much yarn do I need for a sweater?

An adult sweater usually needs 1,000–2,500 yards depending on size, yarn weight, and style. A medium worsted-weight pullover is often around 1,300–1,800 yards.

How much yarn for a cardigan?

Cardigans need a little more than a comparable pullover because of the button bands and front overlap — budget roughly 10–15% extra.

How many skeins for a sweater?

Divide your total yardage by the yards per skein on the label and round up. A worsted sweater is commonly 6–12 skeins; finer yarns mean more, smaller skeins.

Does yarn weight change how much I need?

Yes. For the same finished size, finer yarns require more yardage because more length is needed to cover the area; heavier yarns need fewer yards.

Knit or crochet — which uses more yarn?

Crochet generally uses about 25–35% more yarn than knitting for a comparable garment. Select crochet above to add roughly 30%.

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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.