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Randozi
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Leather Stitch Hole Spacing Calculator

Enter the length of the edge and the pitch you would like. The page rounds to a whole number of segments and gives the real pitch, so the holes come out evenly spaced right into both corners. A second panel converts a pitch between millimetres and stitches per inch.

Holes (both corners included)

26

25 segments · real pitch 4 mm (+0 % from the 4 mm wanted)

First holes from the corner: 0 · 4 · 8 · 12 · 16 · 20 · 24 · 28 · 32 · 36 · 40 · 44 …

Pitch in millimetres ↔ stitches per inch

4 mm = 6.35 stitches per inch

8 stitches per inch = 3.175 mm

Arithmetic only: the right pitch depends on the leather, the thread and the look you want.

How it works

  1. Enter the length between the two corners and the pitch you want.
  2. Read the number of holes, the real pitch and the gap with the pitch you wanted.
  3. Use the second panel to switch a pitch between millimetres and stitches per inch.
  4. Copy the plan.

What people use it for

  • Marking an edge without a last short stitch

    Get a pitch that ends exactly in the corner instead of an awkward last stitch.

  • Comparing stitching irons

    See that a 4 mm pitch is about 6.35 stitches per inch before you buy.

  • A longer or shorter pitch

    Compare two pitches on the same edge and choose the one you prefer.

Questions

What are the formulas?
Segments = the length ÷ the wanted pitch, rounded to the nearest whole number and at least 1. Holes = segments + 1, counting both ends. Real pitch = length ÷ segments. For the conversion, stitches per inch = 25.4 ÷ pitch in mm, and pitch in mm = 25.4 ÷ stitches per inch.
Are the end holes counted?
Yes. The first hole is at the first corner and the last hole is at the other corner. If you want a hole set back from a corner, enter the length between the two outer holes.
Does it recommend a pitch or a thread?
No. The pitch depends on the leather, the thread and the look you want. The page only does the arithmetic and does not claim anything about strength.
Which unit should I use?
Any one, for both the length and the pitch. The unit selector changes only the labels. The conversion panel is always in millimetres and inches.