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C2C blanket calculator (corner to corner)
To size a corner-to-corner (C2C) blanket, multiply each side by your tiles per inch: at 5 tiles per 4 in, a 50 × 60 in throw is 63 × 75 squares, 4,725 tiles in all, worked in 137 diagonal rows. In worsted yarn a C2C throw takes an estimated 2,328–3,599 yards, more than plain stitches because every tile is a chain-3 plus 3 double crochets. It also works backwards: a graph's squares divided by your gauge give the finished size.
- Finished size
- 50.4 × 60 in (128 × 152 cm)
- Diagonal rows
- 137
- Yarn (estimate)
- 2,328–3,599 yd (2,129–3,291 m)
- Skeins to buy
- 20 of 200 yd (high estimate + 10%)
Rows 1–63: increase at both edges. Rows 64–75: increase at one edge and decrease at the other, to grow the length. Rows 76–137: decrease at both edges.
Worked example: a graph to a blanket
You have a pixel graph 60 squares wide and 80 tall, and your worsted swatch measures 5 tiles per 4 in.
- Finished width: 60 ÷ 5 × 4 = 48 in; length: 80 ÷ 5 × 4 = 64 in.
- Tiles: 60 × 80 = 4,800, worked in 60 + 80 − 1 = 139 diagonal rows: increase at both edges for rows 1–60, increase on one edge and decrease on the other for rows 61–80, then decrease at both edges to row 139.
- Yarn: about 2,365–3,656 yd (48 × 64 in × 0.77–1.19 yd per sq in), so 21 skeins of 200 yd with 10% spare.
Yardage per square inch comes from published worsted C2C patterns (a 14 and 27 in C2C square, 0.77–0.97 yd per sq in; a 45 × 68 in C2C blanket, about 1.19), scaled to other yarn weights with standard per-weight ratios.
Questions
How many squares is a C2C throw blanket?
At 5 tiles per 4 in (typical for worsted yarn and a 5 mm hook), a 50 × 60 in throw is 63 × 75 squares, 4,725 in all. Measure your own tile gauge: it changes the count a lot.
How do I measure C2C gauge?
Crochet a small C2C square, at least 7 × 7 tiles, block it, and measure across the tiles' straight edge. Divide the tiles by the inches and multiply by 4 for tiles per 4 in.
How much yarn does a C2C blanket use?
More than plain stitches, because every tile is a chain-3 plus 3 double crochets. Published worsted C2C patterns use about 0.77–1.19 yards per square inch, so a 50 × 60 in throw takes roughly 2,328–3,599 yards. Colour changes add tails, so buy the high end.
How many rows is a C2C blanket?
A C2C piece worked from one corner has as many diagonal rows as its tiles across plus its tiles down, minus 1. For a rectangle you increase at both edges until you reach the short side, then increase on one edge and decrease on the other, then decrease at both.
Can I turn a pixel graph into a blanket size?
Yes: use the graph-to-size mode. Each square on the graph is one tile, so the finished size is the squares across and down divided by your tiles per inch.
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Every number here is an estimate worked out in your browser; nothing you type is sent anywhere. Yarn use changes with your stitch pattern, tension and fibre, so swatch first and buy from one dye lot. Check your whole pattern before you start.