Woodworking Ellipse Layout Calculator
Calculate ellipse focus positions and string-loop length from its two axis dimensions.
Prefilled values are examples. Replace them with measurements and current costs for your project.
Result
Ellipse area
75.398 sq in
Taut closed-loop string length
20.9443 in
Distance from center to each focus
4.4721 in
Approximate perimeter (Ramanujan II)
31.731 in
The two foci lie on the X axis, equally spaced from the center.
Formula
Distance from center to each focus
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Taut closed-loop string length
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Ellipse area
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