Granny Square Blanket Calculator
How many granny squares (or motifs) to make a blanket of your size.
150 squares
10 across × 15 down — finishes about 100 × 150 cm.
How to use
- Crochet or measure one finished square and enter its size.
- Enter the blanket width and height you are aiming for.
- If you join with a border or sashing between squares, enter that join width; leave it 0 for zero-gap joins.
- Read how many squares across and down, the total to make, and the size it actually finishes at.
Good to know
- The counts round to whole squares, so the finished size lands close to — not exactly — your target. Adjust the square size or blanket size to fine-tune.
- Make a couple of spare squares; it is easier than coming up short, and they are handy for gauge or repairs.
- Any square motif works — classic granny, solid granny, or a stitch-pattern square — as long as they all finish the same size.
FAQ
- How do I know my finished square size?
- Crochet one square in your yarn and hook, block it the way you will block the blanket, and measure it. Blocking can change the size noticeably.
- What is the join width for?
- If you join squares with a row of stitches, a border, or sashing strips between them, that adds space. Enter that width so the grid and finished size stay accurate; use 0 for squares sewn edge to edge.
- Does this work for hexagons or other motifs?
- It is built for squares laid in a grid. Hexagons and other shapes tessellate differently, so use it as a rough guide for those and expect to adjust.