THE NUMBERS, EXPLAINED
How to use this calculator.
Each independent seam has a hole at the start offset, then whole-pitch holes without exceeding the end offset. The final unused segment can exceed the requested end offset.
Start with your inputs
Enter seam lengths (mm), stitch pitch (mm), start offset (mm), end offset (mm). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Seam lengths (mm) | 100,80 |
| Stitch pitch (mm) | 5 |
| Start offset (mm) | 5 |
| End offset (mm) | 5 |
A worked example
With the example inputs above, hole counts by seam is 19, 15. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Hole counts by seam | 19, 15 |
| Final hole positions from seam starts (mm) | 95, 75 |
| Total stitching holes | 34 |
How this is calculated
Hole counts by seam
Fit complete pitches between end offsets and include the first hole.
Final hole positions from seam starts (mm)
Add complete stitch pitches to the initial offset.
Total stitching holes
Sum holes across independent seams.
Symbols and units
- a
- Seam lengths (mm)
- b
- Stitch pitch (mm)
- c
- Start offset (mm)
- d
- End offset (mm)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Each independent seam has a hole at the start offset, then whole-pitch holes without exceeding the end offset. The final unused segment can exceed the requested end offset.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Hole counts by seam; Final hole positions from seam starts (mm); Total stitching holes. The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Each independent seam has a hole at the start offset, then whole-pitch holes without exceeding the end offset. The final unused segment can exceed the requested end offset.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax Prealgebra 2e — arithmetic and proportions ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
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