I’ve wound my handspun 3-ply Jacob’s wool yarn into center pull balls. But how much do I really have?

Hand woven magazine published an article about yarn balances. I followed their instructions to make a balance and used acrylic yarn of a known weight per yard.

Because of my scientific background, I have to do my math by using the factor-label method (here is an explanatory video). I know that the yarn on the left is 142 grams per 241 meters, so my 120 cm weighs 0.071g, a weight I would not be able to measure with a kitchen scale. My hand-spun yarn that balances measures 97 cm. I now have the weight per length and can calculate yardage. (Oh yes, I completely mix my metric and standard measurements, but as long as all the labels cancel properly, we’re golden.)

To see how accurate the calculations are, I measured the lightest ball of yarn by laying out a yard with tape on a counter. I measured 29 yards. I put a section of the yarn on the balance, did my calculations and predicted 33 yards. This is a 12% difference in weight, which I find an acceptable margin for error. When planning a pattern, you should have at least 10% more yarn than what is called for. In the case of my hand spun yarn, I will pick a pattern that needs at least 12% less than 530 yards I have.

This was an interesting exercise, and confirmed what I felt when looking at the yarn: it isn’t enough to make a vest. It may be enough the make a hat or two.







