Granny Square Size Calculator
Estimate granny square size by round count, find how many rounds to reach a target size, and plan your blanket layout.
Size by Round Count
Typical: 0.5–1" per round depending on yarn weight
Rounds for Target Size
Blanket Layout Calculator
How to Use
- Use Size by Round Count to see how large your square will be after each round.
- Use Rounds for Target Size to find how many rounds give you the size you want.
- Use Blanket Layout to find how many squares fit in a given blanket size.
Typical Granny Square Sizes by Yarn Weight
| Yarn Weight | Per Round Growth | 5-Round Square | 8-Round Square |
|---|---|---|---|
| Fingering | ~0.4–0.5" | ~2–2.5" | ~3.5–4" |
| Sport / DK | ~0.5–0.65" | ~2.5–3.5" | ~4.5–5.5" |
| Worsted | ~0.65–0.85" | ~3.5–4.5" | ~5.5–7" |
| Bulky | ~0.9–1.2" | ~5–6" | ~8–10" |
Common Uses
- Granny square blankets and afghans
- Patchwork bags and totes
- Pillow covers and cushions
- Colorwork sampler projects
Results are estimates. Actual results vary by gauge, tension, yarn, and hook size.