Question: how to figure out how much yarn you need?
Answer: Step 1: Determine your yarn weight (Column 1) ...  Step 2: Determine your hook size (Column 2) ...  Step 3: Determine your inches per single crochet stitch (Column 3) ...  Step 4: Calculate the total number of stitches in the pattern. ...  Step 5: Calculate the inches of yarn you'll need. ...  Step 6: Determine the number of yards you'll need.