C2C Blanket Calculator
Calculate blocks, increase rows, decrease rows, and yardage for a corner-to-corner crochet blanket.
How to Use
- Enter your desired finished width and length in inches.
- Enter your C2C gauge — how many blocks fit in one inch (typically 0.7–1.0 for worsted weight).
- Select your yarn weight for a yardage estimate.
- Click Calculate C2C Blanket for your complete breakdown.
How C2C Works
Corner-to-corner crochet starts at one corner and works diagonally across the blanket. Each C2C block consists of a chain-6, then 3 double crochets worked into a ch-3 space.
Increase phase: You add one block to each row, growing the diagonal from corner 1 block to the full width. The number of increase rows equals the number of blocks across the short side (width).
Decrease phase: After reaching the widest diagonal, you decrease one block per row to reach the opposite corner. Decrease rows equal the blocks along the long side (length) minus the short side.
Total rows = increase rows + decrease rows. The maximum row width = blocks across + blocks down.
Common C2C Gauges
| Yarn | Hook | Blocks/inch |
|---|---|---|
| Fingering | B/C (2.5–3mm) | ~1.2–1.5 |
| DK | F/G (3.75–4mm) | ~0.9–1.1 |
| Worsted | H/I (5–5.5mm) | ~0.7–0.9 |
| Bulky | K/L (6.5–8mm) | ~0.5–0.7 |
Results are estimates. Actual results vary by gauge, tension, yarn, and hook size.