Granny Square Blanket Calculator
Find out how many granny squares you need, get the layout grid, and estimate total yardage.
Standard Blanket Size Reference
| Blanket Size | Dimensions | 6" Squares | 8" Squares | 10" Squares |
|---|---|---|---|---|
| Baby | 30" × 36" | 5×6 = 30 | 4×5 = 20 | 3×4 = 12 |
| Lap | 36" × 48" | 6×8 = 48 | 5×6 = 30 | 4×5 = 20 |
| Throw | 50" × 60" | 8×10 = 80 | 6×8 = 48 | 5×6 = 30 |
| Full | 54" × 75" | 9×13 = 117 | 7×9 = 63 | 5×8 = 40 |
| Queen | 60" × 80" | 10×13 = 130 | 8×10 = 80 | 6×8 = 48 |
How to Use This Calculator
- Select a blanket size preset or enter your own dimensions.
- Enter the finished size of each granny square (after blocking).
- Add a seam allowance if you'll be seaming squares together (typically 0.25").
- Enter how many yards of yarn each square uses to get total yardage.
- Click Calculate to see the layout grid and total square count.
Tips
- Block your granny squares before joining — blocking evens out size differences and makes joining easier.
- The "actual" blanket size shown accounts for the grid layout and may differ slightly from your target dimensions.
- Traditional granny squares with worsted weight and a 5mm hook typically finish at 4–6" after blocking.
- Add extra yardage for the joining method (slip stitch, single crochet, or whip stitch join).
About this Granny Square Blanket Calculator
Use this free Granny Square Blanket Calculator to get quick, accurate results directly in your browser. It is designed for everyday use with no signup, no downloads, and no account required. No signup is required, and the tool works on phones, tablets, and desktop browsers.