Plan a granny square project end to end — enter your blanket size and square size to see how many squares you need, how much yarn it takes, and how to split that yarn across colors. Built for blankets, throws, and stash-busting scrap projects.
Blanket layout estimator
Your project
About 56 squares at 6 in each for a 40 × 50 in throw in worsted weight. Yardage is an estimate — gauge, tension, and pattern density vary.
Color planning
Split your yarn estimate across colors. Accent colors used in just a round or two need less, while your main and background colors need the most — buy extra of those so you do not run out late in the project.
Square size presets
| Square size | Typical use |
|---|---|
| 4 in | Dense, detailed blankets |
| 6 in | Standard — the most common size |
| 8 in | Faster projects, fewer squares |
| 12 in and up | Statement squares, quick throws |
How many squares for…
| Project | Approx. squares (6 in) |
|---|---|
| Pillow cover | 4–9 |
| Baby blanket | 20–40 |
| Throw blanket | 49–100 |
| Bedspread | 100–300+ |
Joining methods
| Method | Notes |
|---|---|
| Whip stitch | Simple, flat seam; modest extra yarn (about 8%) |
| Slip stitch | Defined ridge between squares; uses a touch more (about 10%) |
| Join-as-you-go | Joins on the final round with no sewing; least added yarn (about 5%) |
The estimator adds yarn for your chosen method automatically.
Great for scrap yarn
Granny squares are the classic stash-buster — perfect for leftover yarn, mixed colors, and partial skeins. Because each square is small, you can use up odd amounts a few yards at a time, then tie the whole project together with one consistent border and joining color. Tip: keep one main color in reserve so the finished blanket still feels cohesive.
Frequently asked questions
How many granny squares do I need for a blanket?
It depends on blanket and square size. As a rough guide with 6 in squares: a baby blanket is around 20–40, a throw 49–100, and a bedspread 100–300 or more. Enter your dimensions above for an exact count.
How much yarn does one granny square use?
A standard 6 in worsted square uses roughly 20–30 yards. Yardage scales with the square size and the yarn weight — bigger squares and finer yarns use more.
How much yarn for a granny square blanket?
Use the estimator above. As a ballpark, a worsted-weight throw often needs 1,200–2,000+ yards once joining and a border are included.
Does the joining method change yarn usage?
Yes. Whip and slip stitch joins add roughly 8–10%, while join-as-you-go adds about 5% and skips sewing. The estimator factors this in.
Can I use scrap yarn for granny squares?
Absolutely — they are a favorite scrap and stash-buster project. Mix leftover colors freely, then unify the look with one consistent border and joining color.