I have a vintage pattern for a circular 32" baby shawl knitted in 2ply wool with 2.75mm needles but no quantity of wool, could you advise me how many balls I would need.
Although, it doesn't calculate circular blanket, but it give you an idea of how much yarn you'll need for certain sizes of square blankets.
I tried calculating the one that closest to your size which is 36'X36" and this requires about 1570 yards of sport yarn. It will need a little more for smaller yarn, so I would suggest buying at least 1800 - 2000 yards which is around 5 balls of 100g sock yarn.
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