How to turn a photo into a crochet pattern that keeps its shape
The short answer
Pick a photo with one clear subject and a plain background, and crop close. Choose the stitch first: C2C squares are square, but a single crochet stitch is wider than it is tall, so the chart needs more rows than stitches or the picture comes out squashed. Reduce the photo to 5 to 10 yarn colours, remove lone stitches, then work from written rows instead of counting squares. Buy yarn from a per-colour estimate plus 15%.
A photo blanket is a low-resolution picture made of yarn. A lap throw 60 squares wide has fewer pixels than the icon on your phone’s home screen. Everything that makes a graphghan succeed follows from that: a simple photo, few colours, and a chart that knows what shape your stitches are.
1. Choose a photo that survives
At 60 to 100 stitches across, small detail disappears. What survives is shape and contrast.
- One subject, filling the frame. Crop closer than feels natural.
- A plain background, or one you are willing to turn into a single colour.
- Contrast between the subject and the background. A black dog on a dark sofa becomes one dark blob.
Pet portraits, initials, club logos and line drawings come out well. Group shots and landscapes rarely do.
2. Choose the stitch before the size
| Single crochet | Corner to corner (C2C) | |
|---|---|---|
| One square of the chart | One stitch | One block of stitches |
| Square size in worsted yarn | About 6.7 mm wide, 5.9 mm tall | About 25 mm each way |
| Detail for the same blanket | High | Low |
| Colour changes | Many, carried or cut | Fewer, chunkier |
| Best for | Faces, fine logos, wall hangings | Bold shapes, pet blankets, first projects |
A C2C block is square, so a square-grid chart is honest. A single crochet stitch is not.
3. The proportion problem
At a typical worsted gauge, single crochet works up at 15 stitches and 17 rows to 10 cm. The stitch is wider than it is tall. Draw the chart on square graph paper, one square per stitch, and the finished piece comes out about 12% shorter than the picture: faces look squashed.
The fix is to add rows. A square photo charted 100 stitches wide needs 113 rows, not 100, to stay square in single crochet. In knitting, where a worsted stitch is 20 stitches by 28 rows to 10 cm, the same picture needs 140 rows.
The photo to crochet pattern maker does this from your gauge. Pick the yarn weight, or type in your own stitches and rows per 10 cm from a swatch, and the chart’s height follows so the finished piece keeps the photo’s shape. You can set the width in stitches, or type the finished width in cm or inches.
4. Cut the colours, then clean up
A photo has thousands of colours, and you will buy perhaps eight yarns.
- Start at 8 colours. 5 to 10 covers nearly every project.
- Merge near-duplicates. Two greys that differ only on screen are one ball of yarn.
- Remove lone stitches. A single stitch of a different colour is two ends to weave in for no visible gain. Turn clean-up on and they are absorbed into their neighbours.
- Fix by hand what the computer got wrong. Tap a square to recolour it; eyes and mouths are worth a minute of attention.
Match the chart’s colours to real yarn in daylight, not on a screen.
5. Work from written rows
Counting squares on a printed grid is where mistakes happen. Written rows are easier to follow: “Row 23: 4 blue, 2 white, 7 blue”. The tool writes every row out, with Row 1 at the bottom for single crochet, and as diagonals from the corner for C2C, including where to increase and decrease. For C2C there is a left-handed setting, which starts in the other corner and mirrors every row.
You can download the chart, colour key and written rows as a PDF. Or choose Start stitching to open the pattern in the row tracker, which shows the current row in words and remembers where you stopped; there is more on that in how to keep track of rows.
Your photo is not uploaded. The chart is made by your own browser. If you send the pattern to your phone, the link carries the finished chart, never the photo.
6. Buy the yarn once
The tool estimates yarn per colour from the stitch count and the yarn weight, and adds 15% for tails, joins and mistakes. The figures are estimates: tension varies a lot between people. For a number you can trust, work a small sample, unravel it, measure the yarn, and enter your own yards per stitch.
As a guide for C2C in worsted: a block uses about 1.2 yards, so a 50 × 60 throw of 3,000 blocks comes to roughly 4,100 yards in all. Buy each colour in one go, from one dye lot.
Start small
Make a cushion front before a blanket. A 30 × 30 C2C square tests your colours and your tension in a weekend, and tells you whether the photo works in yarn before you commit to a throw.
- Crochet
- Craft
