Maths

I've been checking the requirements for my beginner knitting classes. I have to admit, I rarely check requirements when I'm making a simple scarf for myself. I'm happy enough to have a guess and see how I go. I can always adjust as I go along. But it's only fair to be a bit more precise for the sake of a beginner.

At the end ofthe day it comes down to some simple maths. Here's a close up of a garter stitch scarf:

Looks a bit like a brick wall, doesn't it. Each stitch is like one brick. It took three 50 g balls to make this scarf. What if I want a bigger or smaller one? To work out how much wool I need I just need to know how many bricks there are and how much wool I need on average for each one . . . done!