One of my favorite knitting tips that makes my knitting life easier is how to calculate how much yarn you’ll need for a long-tail cast-on. How many times have you ended up with a tail that is much too long, or run out right towards the end? Here’s an easy way to know how much yarn you need:
Let’s say you need to cast on 100 sts. Cast on 10 sts then unravel your cast on and see how much yarn it took. Multiply that length by 10 (10 x 10 = 100) and that will show what length yarn you need. Add a few inches for weaving in (or a longer length for seaming, if necessary), and that’s it!
(Obviously you need to multiply the 10-st-co length by whatever number it will take to give you the number of sts YOU need to cast on).
(If you decide to enter, please leave in the comments that I referred you. Thanks!)