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Hem Fold Fabric Takeup Tool

Add equal-depth hem folds to a finished linear garment dimension; no fabric stretch or shrinkage is assumed.

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Description

Multiply depth by count for totalTakeup and add to finishedLength for cutLength.

Garment and pattern calculations use measurements, allowances, fold conventions, and repeat positions. A local calculation is one pattern component; fabric behavior, fit, and manufacturing tolerances require separate assessment.

Multiply depth by count for totalTakeup and add to finishedLength for cutLength.

When to use this tool

Use Hem Fold Fabric Takeup when you need a bounded pattern, spacing, or allowance component using consistent length units.

How to use the tool and how it works

  1. Enter finishedLength, foldDepth, foldCount. 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 cutLength, totalTakeup. Use the output convention below.

Require nonnegative finishedLength and foldDepth and foldCount 1-4. Multiply depth by count for totalTakeup and add to finishedLength for cutLength.1

Input fieldMeaning and unitsAccepted input
finishedLengthFinished LengthRequired. Finite number; minimum 0.
foldDepthFold DepthRequired. Finite number; minimum 0.
foldCountFold CountRequired. Safe integer; minimum 1; maximum 4.
Output fieldInterpretationReturned shape
cutLengthCut LengthRequired. Finite number.
totalTakeupTotal TakeupRequired. Finite number.
json
{
  "input": {
    "finishedLength": 70,
    "foldDepth": 2,
    "foldCount": 2
  },
  "output": {
    "cutLength": 74,
    "totalTakeup": 4
  }
}

Limitations and assumptions

  • This uses the stated repeated-fold allowance without shrinkage, turn-of-cloth, stitch placement, or fabric-specific construction rules.
  • 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

Check the complete pattern and test fit or material behavior before production.

References

  1. Calculation and input contract: fashion/hem-fold-fabric-takeup — tool.io

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