How this calculator works
Cross-stitch fabric is sold by count, the number of squares or threads in an inch. On Aida each square is one stitch, so a 14 count fabric gives 14 stitches an inch. On linen you usually stitch over two threads, so 28 count linen over two also gives 14 stitches an inch. The design size is the stitch count divided by the stitches per inch. Add twice the margin to each dimension for the piece to cut, because the margin goes on all four sides. Needle and strand recommendations follow the common ranges for each count.
Formula
stitches per inch = fabric count / threads per stitch. design width = stitches across / stitches per inch. fabric width = design width + 2 x margin. The height is calculated the same way.
Worked example
A chart 140 stitches wide and 100 high on 14 count Aida is 10 inches by 7.14 inches, or 25.4 by 18.14 cm. With a 7.5 cm margin on each side the fabric piece is 40.4 by 33.14 cm. The suggested needle is 24 and two strands are typical.
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Frequently asked questions
What does the fabric count mean?
It is the number of squares or threads per inch. Higher counts give smaller, finer stitches and a smaller finished design for the same chart. A 14 count Aida is the most common starting point for beginners.
How much margin should I leave?
Three inches or 7.5 cm on every side is a good working margin for hooping and finishing. Add more for framing with a wide mat, or for a wall hanging where the fabric is the border.
How many strands should I use?
Two strands is standard on 14 and 16 count Aida. Use three on 11 count for better coverage, and one on 22 count or fine linen. The suggestion is a starting point; test on a scrap because thread thickness varies.
Why does linen over two threads match Aida?
Linen is measured by threads, and each stitch covers two in each direction. A 28 count linen therefore gives 14 stitches an inch, the same as 14 count Aida, but with a different texture and no visible grid.