Q - I want to knit a simple baby blanket in worsted weight yarn. How much yarn will I need?
A - While the amount of yarn will depend on your gauge, yarn choice, the stitch pattern you select, and the size of your project, we do have a great chart that has estimates for many common projects. The chart is divided into knit and crochet (which use different yarn amounts!), various types of garments, sizes, and yarns by weight. To find the weight of your yarn, check its label, or look at the list towards the bottom of the page.
For a 20" x 30" baby afghan, you will need around 1000 yards of worsted weight yarn. What does that mean in terms of the number of balls or skeins you need? To find out how many skeins/balls/cones to purchase, divide the total yardage needed by the chosen yarn's amount per skein/ball/cone. Be sure to round up to the nearest whole skein/ball/cone. For instance, if you were to use the Nature's Choice Organic Cotton, you would want to divide 1000 yards needed total by the 103 yards per ball of Nature's Choice, for approximately 10 balls.
This chart really is a great reference -- you may even want to bookmark it or print out a PDF of it to keep handy!