Print Gatefold Center Panel Remainder Tool

Description

Subtract both flaps and gaps for centerPanel and return the maximum of center panel and the two flaps as foldedWidth.

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.

Subtract both flaps and gaps for centerPanel and return the maximum of center panel and the two flaps as foldedWidth.

When to use this tool

Use Print Gatefold Center Panel Remainder when you need a print-production estimate from explicitly supplied dimensions and material factors.

How to use the tool and how it works

Enter flatWidth, leftFlap, rightFlap, leftGap, rightGap. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read centerPanel, foldedWidth. Use the output convention below.

Require nonnegative panel, flap, and gap dimensions whose sum fits flatWidth. Subtract both flaps and gaps for centerPanel and return the maximum of center panel and the two flaps as foldedWidth.^[1]

Input field	Meaning and units	Accepted input
flatWidth	Flat Width	Required. Finite number; minimum 0.
leftFlap	Left Flap	Required. Finite number; minimum 0.
rightFlap	Right Flap	Required. Finite number; minimum 0.
leftGap	Left Gap	Required. Finite number; minimum 0.
rightGap	Right Gap	Required. Finite number; minimum 0.

Output field	Interpretation	Returned shape
centerPanel	Center Panel	Required. Finite number.
foldedWidth	Folded Width	Required. Finite number.

json

{
  "input": {
    "flatWidth": 600,
    "leftFlap": 145,
    "rightFlap": 145,
    "leftGap": 5,
    "rightGap": 5
  },
  "output": {
    "centerPanel": 300,
    "foldedWidth": 300
  }
}

Limitations and assumptions

This ideal width model omits material thickness, fold geometry, overlap, binding, and printer-specific finishing constraints.
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

Calculation and input contract: graphic-design/print-gatefold-center-panel-remainder — tool.io

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