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Circle skirt drafting planner
Calculate seam-line radii and equal panel angles for a circle skirt, with a drawing and measurement table.
01Enter your values
Runs in your browser02Circle skirt drafting planner
Runs in your browser
How it works
Calculate seam-line radii and equal panel angles for a circle skirt, with a drawing and measurement table.
r = (C + E) / (2πF); R = r + L; θ = 360F / N
Runs in your browser
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Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Calculate seam-line radii and equal panel angles for a circle skirt, with a drawing and measurement table.
For home sewists drafting circular skirts. Enter waist, finished length and optional ease in one unit. The circle multiple accepts quarter (0.25), half (0.5), full (1), double (2) and custom values. Radius = (waist + ease) / (2π × multiple); divide the total angle by panel count. Each panel must be at most 360°. Draw the arcs from one centre, join their ends and repeat the panel count. The SVG shows one complete panel, not a half-pattern on a fold.
How to use it
- Enter your values
Unit for all lengths · Waist circumference · Finished skirt length · Circle multiple (0.5 = half, 1 = full) · Equal panels · Waist ease
- Calculate / generate
Calculate seam-line radii and equal panel angles for a circle skirt, with a drawing and measurement table.
- Result
Waist radius: 12.732395 cm
Calculation method
r = (C + E) / (2πF); R = r + L; θ = 360F / N
Circle skirt drafting planner
- Unit for all lengths
- cm
- Waist circumference
- 80
- Finished skirt length
- 60
- Circle multiple (0.5 = half, 1 = full)
- 1
- Equal panels
- 4
- Waist ease
- 0
Result
Waist radius: 12.732395 cm
Frequently asked questions
Does this include cutting allowances and a waistband?
No. Add seam and hem allowances and draft the waistband and opening separately. It does not estimate fabric, stretch, shrinkage or fit. Test on paper; a 360° panel needs an opening to join other panels.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.