Pleats fold extra fabric behind the visible part of the skirt. A knife pleat is a single fold in one direction; a box pleat folds fabric away on both sides of a flat panel. The more pleats and the deeper they are, the more fabric you need: a fully pleated skirt typically uses three times the waist measurement.
How to use the Pleated Skirt Calculator
- Pleat type
- Waist
- Number of pleats
- Skirt length
- Hem allowance
- Seam allowance
- Waistband height (finished)
- Waistband overlap
Results update as you type, and every field accepts the units shown in its menu.
How it works
Choose the pleat type, enter the waist, number of pleats, desired skirt length, hem, seam allowance, waistband height and overlap.
Inputs explained
| Field | What to enter |
|---|---|
| Pleat type | Choose one: Knife pleats (3× fabric), Box pleats (3× fabric), Shallow knife pleats (2× fabric) |
| Waist | Units: in, cm |
| Number of pleats | A number |
| Skirt length | Units: in, cm |
| Hem allowance | Units: in, cm |
| Seam allowance | Units: in, cm |
| Waistband height (finished) | Units: in, cm |
| Waistband overlap | Units: in, cm |
What each result means
- Fabric for one pleat = [Waist]÷[Number of pleats]×round([Pleat type])
- Skirt fabric width = [Fabric for one pleat]×[Number of pleats] + 2×[Seam allowance]
- Skirt fabric length = [Skirt length] + [Hem allowance] + [Seam allowance]
- Waistband length = [Waist] + [Waistband overlap] + 2×[Seam allowance]
- Waistband width to cut = 2×[Waistband height (finished)] + 2×[Seam allowance]
- Visible width of each pleat at the waist = [Waist]÷[Number of pleats]
Example values
How the main result changes when Waist changes and everything else stays at the example values above:
| Waist (in) | Skirt fabric width (in) |
|---|---|
| 14 | 43.3 |
| 21 | 64.3 |
| 28 | 85.3 |
| 35 | 106.3 |
| 42 | 127.3 |
| 56 | 169.3 |
Formula
Fabric per pleat = waist ÷ pleats × 3 (knife) or × 3 (box, with two folds)
Skirt fabric width = fabric per pleat × pleats + 2 × seam allowance
Skirt fabric length = length + hem + seam allowance
Waistband = (waist + overlap + 2 × seam) × (2 × band height + 2 × seam)
Worked example
Inputs: Pleat type: Knife pleats (3× fabric); Waist: 28 in; Number of pleats: 16; Skirt length: 20 in; Hem allowance: 1.5 in; Seam allowance: 0.625 in; Waistband height (finished): 1.25 in; Waistband overlap: 1 in.
Results: Fabric for one pleat = 5.25 in; Skirt fabric width = 85.3 in; Skirt fabric length = 22.1 in; Waistband length = 30.2 in; Waistband width to cut = 3.75 in; Visible width of each pleat at the waist = 1.75 in.
Frequently asked questions
How much fabric for a pleated skirt?
About three times your waist measurement in width for full knife or box pleats, plus seams.
How do I space pleats evenly?
Divide the waist by the number of pleats for the visible width, and mark each pleat at three times that on the fabric.
What fabric holds pleats best?
Wool, polyester blends and other fabrics that take a crisp press; cotton pleats soften with washing.