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Booklet Spine Width Paper Factor Tool

Simple stacked-leaf spine estimate with explicit material calipers and binding allowance; the multiplier is a supplied effective sheets-per-leaf factor.

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Description

Return pages/2 as leafCount, multiply it by paperCaliper and sheetsPerLeaf, then add twice coverCaliper and adhesiveAllowance for spineWidth.

Print planning connects digital dimensions with physical sheets, ink coverage, folds, and binding. A numerical estimate becomes meaningful only after fixing physical units, material assumptions, and which areas or surfaces are counted.

Return pages/2 as leafCount, multiply it by paperCaliper and sheetsPerLeaf, then add twice coverCaliper and adhesiveAllowance for spineWidth.

When to use this tool

Use Booklet Spine Width Paper Factor when you need a print-production estimate from explicitly supplied dimensions and material factors.

How to use the tool and how it works

  1. Enter pages, sheetsPerLeaf, paperCaliper, coverCaliper, adhesiveAllowance. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read leafCount, textThickness, spineWidth. Use the output convention below.

Require nonnegative integer pages, positive sheetsPerLeaf, and nonnegative calipers and adhesive allowance. Return pages/2 as leafCount, multiply it by paperCaliper and sheetsPerLeaf, then add twice coverCaliper and adhesiveAllowance for spineWidth.1

Input fieldMeaning and unitsAccepted input
pagesPagesRequired. Safe integer; minimum 0.
sheetsPerLeafSheets Per LeafRequired. Finite number; strictly above 0.
paperCaliperPaper CaliperRequired. Finite number; minimum 0.
coverCaliperCover CaliperRequired. Finite number; minimum 0.
adhesiveAllowanceAdhesive AllowanceRequired. Finite number; minimum 0.
Output fieldInterpretationReturned shape
leafCountLeaf CountRequired. Finite number.
textThicknessText ThicknessRequired. Finite number.
spineWidthSpine WidthRequired. Finite number.
json
{
  "input": {
    "pages": 200,
    "sheetsPerLeaf": 1,
    "paperCaliper": 0.1,
    "coverCaliper": 0.3,
    "adhesiveAllowance": 0.4
  },
  "output": {
    "leafCount": 100,
    "textThickness": 10,
    "spineWidth": 11
  }
}

Limitations and assumptions

  • Odd page counts and fractional leaves are accepted; sheetsPerLeaf is a supplied thickness multiplier and no binding, paper compression, imposition, or printer-specific spine specification is selected.
  • Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
  • Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Confirm stock, binding, finishing, and output-resolution assumptions with the production specification. Use an imposed proof or physical sample when fold behavior, tolerances, or actual appearance matter.

References

  1. Calculation and input contract: graphic-design/booklet-spine-width-paper-factor — tool.io

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