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Calcimator

Elastic Length Calculator

Calculate the correct cut length for elastic based on body measurement, desired stretch ratio, and overlap for joining. Get comfort recommendations.

Inputs

in
%
in

Results

Cut Elastic Length

24.5 in

≈ 7 credit cards

Relaxed Length24 in
Stretch Amount6 in
Stretch Percentage25%
Comfort (3=best)3
How to Use This Calculator
  1. Enter the body measurement (inches) where the elastic will sit (waist, hip, wrist, etc.).
  2. Set the stretch ratio for your elastic type (typical: 0.75-0.85 for waistbands).
  3. Enter overlap for joining (inches).
  4. Review cut length, relaxed length, stretch amount, and stretch percentage.
  5. Test elastic tension on your body before cutting -- overly tight waistbands are uncomfortable to wear.

How the result changes with Body Measurement

Body MeasurementCut Elastic Length
1512.5 in
2822.9 in
4334.9 in
5544.5 in

What each input means

Body Measurement
Body circumference where elastic will sit (waist, wrist, etc.)
Stretch Ratio
Relaxed elastic as % of body measurement (75-85% is typical)
Overlap for Joining
Extra length for overlapping and stitching the elastic ends

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Body Measurement = 30, Stretch Ratio = 80, Overlap for Joining = 0.5 = 3 input(s) provided
  2. Calculate Cut Elastic Length
    Cut Elastic Length
    24.5 = 24.5
  3. Calculate Relaxed Length
    Relaxed Length
    24 = 24
  4. Calculate Stretch Amount
    Stretch Amount
    6 = 6

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