semkuCross stitch calculator
Compare finished design and fabric sizes across stitch counts using one pattern and one margin.
Enter stitches per inch after allowing for how many fabric threads each cross covers. For example, 28 threads per inch worked over two gives 14 stitches per inch. No automatic fabric adjustment is applied.
Changing units preserves the exact margin. A converted input may show a rounded value; editing it replaces the retained margin.
| Stitches/in | Finished design | With margin | Fabric rounded up |
|---|---|---|---|
| 14 | 10.00 × 7.14 in 25.40 × 18.14 cm | 14.00 × 11.14 in 35.56 × 28.30 cm | 14 × 12 in 36 × 29 cm |
| 16 | 8.75 × 6.25 in 22.23 × 15.88 cm | 12.75 × 10.25 in 32.39 × 26.04 cm | 13 × 11 in 33 × 27 cm |
| 18 | 7.78 × 5.56 in 19.76 × 14.11 cm | 11.78 × 9.56 in 29.92 × 24.27 cm | 12 × 10 in 30 × 25 cm |
Each length is displayed to 2 decimal places. Fabric is rounded up separately to whole inches and whole centimeters from the unrounded values; these are two different size options.
Convert a single length with Inches to cm.
Calculation rules
Finished width = pattern width ÷ effective count; finished height = pattern height ÷ effective count. Count means stitches per inch, not necessarily the fabric’s threads per inch.
Fabric width and height each equal the corresponding finished length plus twice the margin on one edge. You choose the allowance for your project; shrinkage, seams, framing and shop sizes are not automatically included.
One inch is exactly 2.54 cm (127/50 cm). Calculations retain exact fractions. Displayed lengths round once to two decimal places, with an exact halfway value rounded up. Whole-unit fabric sizes round up directly from the unrounded length in each unit.
For example, a 140 × 100 stitch pattern at 14 stitches per inch finishes at 10.00 × 7.14 in. A 2 in margin on every edge gives 14.00 × 11.14 in before whole-unit rounding: choose 14 × 12 in or, independently, 36 × 29 cm.
Input limits are calculator support limits, not fabric specifications. Only dot decimals are accepted; exponents, thousands separators, negative values and inputs longer than 32 characters per number are not supported.
Sources and definitions
Source for the exact inch-to-centimeter conversion. The rounding and fabric-size rules here are our calculation policy.
Yarn Tree — Cross Stitch Calculator
Terminology reference for fabric threads per inch, stitching over threads and extra space on each edge.
Frequently asked questions
- What count should I use for over-two stitching?
- Divide the fabric threads per inch by the number of threads each cross covers. For 28 threads per inch worked over two, enter 14. Use your pattern’s stitching method; the calculator does not infer it from fabric type.
- How much margin should I add?
- Enter the extra length you want on each of the four edges. The 2 in starting value is an example. Decide the allowance for your finishing method; it is not a guarantee that a particular margin is sufficient.
- Why are the rounded inch and centimeter sizes different?
- Each rounds up independently to a whole unit. A length of 14 in equals 35.56 cm, so the centimeter option rounds to 36 cm. Converting the rounded inch option does not produce the independent centimeter option.
- Does this calculate floss or generate a pattern?
- No. It compares design and fabric dimensions from stitch counts. It does not generate patterns, estimate floss, recommend needles or products, or compensate for shrinkage.
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Calculations run in your browser without sending your calculation inputs or results to the server. See “Privacy on this page” for information about access data.