Ellipse Area Calculator
Enter the semi-major and semi-minor axis lengths of an ellipse to calculate its area.
Ellipse Area Calculator
Calculate the area of an ellipse from its semi-major and semi-minor axis lengths.
This calculator provides an estimate for general informational purposes only. It is not a substitute for professional financial, mechanical or engineering advice.
An ellipse's area generalizes the circle-area formula: instead of πr², it's π times the semi-major axis times the semi-minor axis.
Example
- With the default values shown above, this calculator returns: Area ≈ 125.66.
Frequently Asked Questions
What is the formula?
Area = π × a × b, where a is the semi-major axis (half the longest diameter) and b is the semi-minor axis (half the shortest diameter).
What if it's a circle?
A circle is a special ellipse where a = b = radius, and the formula reduces to the familiar πr².