Circle Skirt Calculator
Calculate the radius and fabric details needed to sew a perfect Full, 3/4, Half, or Quarter circle skirt.
How to make a circle skirt
A circle skirt is a simple, flowing skirt made from a circular piece of fabric with a hole in the center for the waist. The amount of "flare" depends on the type of circle you choose:
- Full Circle (360°): Very voluminous, great for twirling.
- 3/4 Circle (270°): Less volume than full, but still very flowy.
- Half Circle (180°): A classic A-line shape with moderate flare.
- Quarter Circle (90°): A gentle A-line, minimal flare.
The Formula
The key to making a circle skirt is calculating the Waist Radius (R), which is the distance from the center point to where you cut the waist hole.
R = Waist Circumference / (2 * π * Circle Portion) - Seam Allowance
Where "Circle Portion" is 1 for Full, 0.75 for 3/4, etc.
For the total length of fabric needed (from the center), you add the skirt length and hem allowance to the radius.
Our calculator assumes a standard 2 cm seam allowance at the waist and 2 cm hem allowance.