This pleat calculator helps calculate pleat width, pleat count, underlap, and total material for sewing and garment making.

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It's recommended to use an even number of pleats.
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This pleat calculator helps you determine pleat width, pleat count, underlap, and total fabric needed for garments. It is designed for sewing, tailoring, and traditional clothing construction.

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Developed with by TheCodingJ's
Follow these simple steps to get accurate pleat width, count, underlap, and total material.

Measure the desired waist circumference of the garment.

Decide what you want to set first.

  • Pleat Count: how many pleats.
  • Pleat Width: how wide each pleat.

Enter the usable width of the fabric before pleating. Do not include the seam allowances in this measurement.

The calculator automatically updates the remaining values.

  • Pleat Width
  • Pleat Count
  • Pleat Underlap

Fine tune any value to get the pleat look and fabric usage you want.

How the calculations work
Value Formula
Pleat Width Pleat Width = Waist ÷ Pleat Count
Pleat Count Pleat Count = Waist ÷ Pleat Width
Pleat Underlap Pleat Underlap = (Total Material - Waist) ÷ Pleat Count
Total Material Total Material = Pleat Count × (Pleat Width + Pleat Underlap)
What is underlap?

Underlap is the extra fabric hidden behind each pleat. It allows the pleats to overlap properly and gives the garment its fullness.

Diagram showing pleat width, underlap, waist circumference, and total material