Ellipse Calculator & Widget Generator

Understanding Ellipses

An ellipse is a smooth, closed curve that results from intersecting a cone with a plane. It's characterized by two axes:

• The semi-major axis (a) is half the length of the longest diameter
• The semi-minor axis (b) is half the length of the shortest diameter

Key Formulas

• Area = πab
• Circumference ≈ 2π√[(a² + b²)/2]
• Eccentricity = √(1 - b²/a²)