Corner-to-Corner Crochet Counter
Track diagonal rows and blocks through increase and decrease sections.
Live Corner-to-Corner Crochet Counter
Instant browser calculations & session state saved locally.
Key Capabilities
- ✓Phase tracking: Increase Phase, Straight Wall Phase, Decrease Phase
- ✓Block tally per diagonal row (Row N = N blocks on square projects)
- ✓Pixel graphghan color block checklist
- ✓Diagonal progress indicator showing total blocks worked
Expert Crafting Advice
- 💡During the increase phase, each diagonal row has exactly the same number of tiles as the row number.
- 💡Slip stitch across the 3 dc of the last block when beginning a decrease corner.
How the Corner-to-Corner Crochet Counter Works
The Corner-to-Corner Crochet Counter works in 4 steps.
- 1
Enter the tile grid
Write the width and height in tiles in the notes box, such as "40 × 50 tiles".
- 2
Set the diagonal target
Enter the total diagonals, width + height − 1, into Target Goal.
- 3
Tap after each diagonal
Press Space or tap + Count after finishing each diagonal row.
- 4
Switch phases at the corners
Stop increasing on the side that reaches its tile count, then decrease on that side until the final tile.
Corner-to-Corner Crochet Counter Formula
The Corner-to-Corner Crochet Counter formula gives total diagonals, total tiles and the tile count of any diagonal.
Total diagonals = Width + Height − 1
Total tiles = Width × Height
Tiles in diagonal d = min(d, Width, Height, Width + Height − d)
- Width
- Tiles across
- Height
- Tiles up
- d
- Diagonal row number
Worked example: A 40 × 50 tile blanket has 40 + 50 − 1 = 89 diagonals and 2,000 tiles. Diagonal 45 holds min(45, 40, 50, 45) = 40 tiles.
Corner-to-Corner Crochet Counter Conversion Table
The Corner-to-Corner Crochet Counter conversion table lists diagonals, tiles and approximate finished size for common C2C grids at about 0.8 inch (2 cm) per tile in worsted yarn.
| Grid (tiles) | Diagonals | Total tiles | Approx. size (in) | Approx. size (cm) |
|---|---|---|---|---|
| 10 × 10 | 19 | 100 | 8 × 8 | 20.3 × 20.3 |
| 20 × 20 | 39 | 400 | 16 × 16 | 40.6 × 40.6 |
| 30 × 40 | 69 | 1,200 | 24 × 32 | 61 × 81.3 |
| 40 × 50 | 89 | 2,000 | 32 × 40 | 81.3 × 101.6 |
| 50 × 60 | 109 | 3,000 | 40 × 48 | 101.6 × 121.9 |
| 60 × 75 | 134 | 4,500 | 48 × 60 | 121.9 × 152.4 |
Each tile uses 3 dc, so total dc = total tiles × 3.
What is a Corner-to-Corner Crochet Counter?
A corner-to-corner crochet counter is a tracker for C2C crochet that counts diagonal rows of tiles through the increase section, the turning corner and the decrease section. The Crochet Stitch Counter Corner-to-Corner Crochet Counter keeps each diagonal row on its correct tile count.
Corner-to-corner (C2C) crochet builds fabric from small square tiles, each made of a chain-3 and 3 double crochet (dc). Work starts at one corner with 1 tile and grows by 1 tile per diagonal row until the piece reaches its width and height, then shrinks back to 1 tile at the opposite corner.
C2C graphs show pictures in tiles, so the diagonal row number tells you which line of the graph to read.
What are the Uses of a Corner-to-Corner Crochet Counter?
There are 4 main uses of a Corner-to-Corner Crochet Counter.
Making C2C blankets
The tracker follows growth, corner turn and shrink phases.
Working pixel graphs
Diagonal numbers match the graph lines.
Building rectangles
Separate width and height stops show where each side turns.
Estimating yarn
Total tiles multiplied by yarn per tile give a yarn estimate.
More Technique-specific counter modes
View All 70 Tools →Amigurumi Stitch Counter
Track rounds, expected stitch totals, and separate body parts.
Continuous Spiral Round Counter
Track rounds without assuming a joining slip stitch.
Joined Round Counter
Count rounds that you join with a slip stitch, using your own chain rules.