โ๏ธ DIY & Craft
Circle Skirt Calculator
A circle skirt is cut as an annulus, so its waist radius comes straight from the circumference formula โ waist divided by two pi for a full circle, doubled for a half circle. Getting that radius right is what stops the skirt twisting at the waistband.
How it works
Waist measurement
Measurement unit
Skirt length
Circle fullness
Fabric width
Seam and hem allowance
Waist radius
Waist radius plus length
Fabric needed per panel
Fabric to buy
Waistband length
Finished diameter
Frequently asked questions
How do I use the Circle Skirt Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.