Yarn Requirements for Crocheting a BlanketBlanket SizeYarn WeightCrochet StitchBalls of Wool NeededBaby (36"x36")Light (3)Single Crochet4-6 Throw (52"x60")Medium (4)Double Crochet10-15 Twin (66"x90")Medium (4)Half Double Crochet20-25 Queen (90"x108")Heavy (5)Tunisian Crochet30-40 King (108"x108")Heavy (5)Triple Crochet40-50 
Hey there! When it comes to crocheting a blanket, the number of balls of wool you'll need depends on a few factors. The size of the blanket, the weight of the yarn, and the crochet stitch you choose all play a role in determining how much yarn you'll need. Let's dive into the details!
First, let's talk about the size of the blanket. If you're making a small lap blanket, you'll obviously need fewer balls of wool compared to a large afghan that covers a queen-size bed. The dimensions of your desired blanket will help you estimate the amount of yarn you'll need.
Next, consider the weight of the yarn you're using. Yarn comes in different weights, such as lace, fingering, sport, worsted, and bulky. Thicker yarns require fewer balls to complete a project, while thinner yarns may require more. Keep in mind that the weight of the yarn also affects the drape and warmth of the finished blanket, so choose accordingly.
Now, let's talk about the crochet stitch. Different stitches use varying amounts of yarn. For example, a single crochet stitch uses less yarn compared to a double crochet or a shell stitch. If you're following a specific crochet pattern, it may provide guidance on the estimated amount of yarn needed.
To give you a general idea, let's consider a standard worsted weight yarn and a medium-sized blanket. For a 50" x 60" blanket, you'll typically need around 12 to 16 balls of yarn. However, this is just a rough estimate, and it's always better to have extra yarn on hand to avoid running out in the middle of your project.
If you're unsure about the exact amount of yarn you'll need, I recommend checking the yarn label. Most yarn labels provide information on the yardage or meterage per ball. You can then calculate the total yardage needed based on your blanket's dimensions and the stitch you're using.
Yarn Quantity Guide for Crochet BlanketsStitch TypeYarn Weight (grams)Yarn Length (meters)Approx. Blanket Size (cm)Single Crochet1000200090x90Double Crochet1200240090x90Half Double Crochet1100220090x90Tunisian Crochet1300260090x90Granny Square15003000100x100Shell Stitch14002800100x100V-Stitch1200240090x90
Remember, it's always better to have a little extra yarn than to run out, especially if you're using a specific dye lot or color that may be difficult to match later on.
I hope this helps you estimate the number of balls of wool you'll need for your crochet blanket project! Happy crocheting!