Seam length · End clearance · Target pitch
Mistake: Changing units and assuming the entered numbers were converted.
Fix: Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
Calculators · Free
Straight saddle-stitch marking planner
Place symmetric holes along a straight leather seam.
01Enter your values
Runs in your browserRuns offline in your browser. Once the page and required files have loaded, processing needs no internet.
02Straight saddle-stitch marking planner
Runs in your browser
How it works
Place symmetric holes along a straight leather seam.
U = L − 2e; n = max(1, round(U / p)); h = n + 1; p′ = U / n; xᵢ = e + i × p′
Runs in your browser
Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Place symmetric holes along a straight leather seam.
Subtract two end clearances. Round usable length divided by target pitch to the nearest integer, at least one. Divide usable length by that interval count. Holes = intervals + 1; list every position.
How to use it
- Enter your values
Seam length · End clearance · Target pitch
- Calculate / generate
Place symmetric holes along a straight leather seam.
- Result
Adjusted pitch: 3.913043 mm Holes: 24 Intervals: 23
Calculation method
- Subtract two end clearances.
- Round usable length divided by target pitch to the nearest integer, at least one.
- Divide usable length by that interval count.
- Holes = intervals + 1; list every position.
U = L − 2e; n = max(1, round(U / p)); h = n + 1; p′ = U / n; xᵢ = e + i × p′
Straight saddle-stitch marking planner
- Seam length
- 100 mm
- End clearance
- 5 mm
- Target pitch
- 4 mm
Result
Adjusted pitch: 3.913043 mm Holes: 24 Intervals: 23
Frequently asked questions
Scope and workshop checks
Count holes, not just intervals. Adjusted spacing is for dividers or individual marking; a fixed-pitch iron cannot adopt it. Only a straight open seam, equal end clearances, up to 10,000 intervals. Curves and closed seams are outside scope.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.
Terms and definitions
Enter your values
- Measurement system
The initial choice follows your browser region. Your choice is remembered on this device. Gallons are US gallons. Switching units keeps your numbers unchanged and interprets them in the new unit.
Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
- Seam length
Round usable length divided by target pitch to the nearest integer, at least one.
Enter a numerical value for this quantity. Use the unit shown beside this field. mm / in
Minimum: 0.001 · Maximum: 1000000 mm
- End clearance
Subtract two end clearances.
Enter a numerical value for this quantity. Use the unit shown beside this field. mm / in
Minimum: 0 · Maximum: 1000000 mm
- Target pitch
Round usable length divided by target pitch to the nearest integer, at least one.
Enter a numerical value for this quantity. Use the unit shown beside this field. mm / in
Minimum: 0.001 · Maximum: 1000000 mm
Result
- Result
Subtract two end clearances. Round usable length divided by target pitch to the nearest integer, at least one. Divide usable length by that interval count. Holes = intervals + 1; list every position.
Calculated from your entries using the method below.
- Adjusted pitch
Round usable length divided by target pitch to the nearest integer, at least one.
Calculated from your entries using the method below.
- Holes
Holes = intervals + 1; list every position.
Calculated from your entries using the method below.
- Intervals
Holes = intervals + 1; list every position.
Calculated from your entries using the method below.
- Value
Subtract two end clearances. Round usable length divided by target pitch to the nearest integer, at least one. Divide usable length by that interval count. Holes = intervals + 1; list every position.
Calculated from your entries using the method below.
- Unit
Subtract two end clearances. Round usable length divided by target pitch to the nearest integer, at least one. Divide usable length by that interval count. Holes = intervals + 1; list every position.
Calculated from your entries using the method below.
Common mistakes and quick fixes
Scope and workshop checks
Mistake: Treating a result as valid outside the described scope.
Fix: Count holes, not just intervals. Adjusted spacing is for dividers or individual marking; a fixed-pitch iron cannot adopt it. Only a straight open seam, equal end clearances, up to 10,000 intervals. Curves and closed seams are outside scope.
Limits and key assumptions
- Count holes, not just intervals. Adjusted spacing is for dividers or individual marking; a fixed-pitch iron cannot adopt it. Only a straight open seam, equal end clearances, up to 10,000 intervals. Curves and closed seams are outside scope.
- Displayed results may be rounded; rounding does not add measurement precision.