Design it Yourself Sweater Project | Step 6

I've sketched my sweater pattern to scale and swatched to choose my yarn, stitch pattern and gauge. Now I have almost enough information to make a good estimation of how much yarn I'll need to knit my sweater. This step requires a little math, but again it's nothing more complicated than what you learned in middle school. I will also use one slightly unusual piece of equipment to estimate my yarn usage, a food scale.