C2C Graph Maker

Crochet

Choose a picture, set the size in blocks and the number of colours. Download the chart and the written rows.

Quick answer. A C2C blanket 50 blocks wide and 60 tall has 3,000 blocks worked in 109 diagonal rows (width plus height minus one).

Source: corner to corner diagonals, worked by this page's graph engine.

Your graph

Photo or picture Stays on your device. Simple pictures with bold shapes work best. A heart is loaded to start.

Blocks wide Blocks tall Colours Block size, in Yards per block Keep picture shape

Block size and yards per block come from your own swatch: work a 5 x 5 block square, measure it, and unravel it to measure the yarn.

Colour key
Colour	Blocks	Share	Yarn

Written C2C rows

How the graph maker works

Your picture is shrunk to one pixel per block, averaging the colour inside each block.
The colours are grouped into the number you choose, so similar shades become one yarn.
Colours are lettered A, B, C from most blocks to fewest.
Each diagonal is written out as runs: "3 A, 2 B" means 3 blocks of A then 2 of B.

Odd rows are listed from the bottom edge up and even rows from the top down, following the turn of the work. Row 1 is the bottom left corner.

Rows and blocks by blanket size

Blocks and diagonal rows for common C2C sizes
Piece	Blocks	Total blocks	Diagonal rows
Small pillow	30 x 30	900	59
Baby blanket	40 x 40	1,600	79
Throw	50 x 60	3,000	109
Large throw	60 x 80	4,800	139

Block counts are examples. Your finished size is blocks times your own block size.

Tips for a clean chart

Crop tight around the subject first. Background takes blocks too.
Start with 4 to 6 colours. Every extra colour is another bobbin to manage.
Go wider for detail: faces need about 60 blocks across to read well.
Bold outlines and flat colours convert better than photos with soft shading.

Common questions

How do I turn a picture into a C2C graph?

Choose your photo, set how many blocks wide the blanket is and how many colours to use. The chart, colour counts and written rows update as you change them, all in your browser.

How many rows is a C2C blanket?

Width in blocks plus height in blocks, minus one. A 50 x 60 block throw has 109 diagonal rows.

How do I work out yarn for a C2C blanket?

Make a 5 x 5 block swatch, unravel it and measure the yarn, then divide by 25 for yards per block. Enter it and the colour key shows the yarn for each colour.

How big is one C2C block?

It depends on your yarn, hook and stitch. Measure a small swatch: a 5 x 5 square divided by 5 gives the block size.

Can I use this for tapestry crochet or knitting charts?

Yes. The square grid and colour key work for tapestry crochet, mosaic, intarsia and pixel blankets. Use the C2C rows only for corner to corner.

Is my photo uploaded?

No. The picture is processed on your device and never leaves it.