The Eccentricity of an Ellipse calculator computes the eccentricity of a conic section (e.g., ellipse) based on the lengths of the semi major and minor axes.
INSTRUCTIONS: Choose units and enter the following:
Eccentricity (e): The calculator returns the eccentricity of the ellipse.
In mathematics, an ellipse is a curve in a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the curve. As such, it is a generalization of a circle, which is a special type of an ellipse having both focal points at the same location. The shape of an ellipse (how "elongated" it is) is represented by its, which for an ellipse can be any number from 0 (the limiting case of a circle to arbitrarily close to but less than 1.
Description of an ellipse is from Wikipedia (en.wikipedia.org/wiki/Ellipse)