Circle Skirt Yardage Calculator
Your measurements
Results
- Inner radius
- 4.87 in
- Outer radius
- 30.87 in
- Fabric needed
- 1.72 yd
≈ 1.57 m
Diameter (61.7 in) exceeds fabric width — cut as two pieces seamed at the sides.
How it works
The skirt is a flat annulus (a ring shape). The inner edge must equal your waist measurement plus seam allowance, so its circumference determines the inner radius: rinner = (waist + seam) ÷ (2π × fullness).
The outer radius is the inner radius plus the desired skirt length plus a hem allowance. Yardage depends on whether your chosen fabric width fits the full diameter — if not, the skirt is cut as two halves seamed at the sides, which doubles the required length.
Frequently asked questions
How much fabric do I need for a circle skirt?
For a full circle skirt on 60-inch fabric, most adult waists (26–34 inches) and a 25-inch length need 2.5 to 3 yards. Narrower 45-inch fabric usually requires twice the length because the skirt must be cut in two half-circles seamed at the sides.
What is the formula for a circle skirt inner radius?
Inner radius = (waist measurement + seam allowance) ÷ (2 × π × fullness fraction). Use 1 for a full circle, 0.75 for a three-quarter circle, and 0.5 for a half circle.
Do I need to add a hem and seam allowance?
Yes. Add your seam allowance (typically 1.5 cm or 5/8 inch) to the waist measurement before dividing, and add your hem allowance (typically 1 inch / 2.5 cm) to the desired length when calculating the outer radius.
Why does a half circle skirt use less fabric?
A half circle skirt has half the hem circumference of a full circle, so it fits inside a smaller fabric square and rarely requires piecing on standard 60-inch fabric.
More free sewing tools
Knit Stretch Percentage Calculator
Measure a knit's stretch percentage and check it against your pattern's requirement.
Fabric Yardage & Length Converter
Convert between centimeters, inches, meters, yards, and feet — instantly.
Fabric Yardage Calculator
Estimate how much fabric any project needs by garment, size, and fabric width.
Smocking Pleater Calculator
Calculate the flat fabric size to cut before pleating for any smocking plate.