Ellipse Calculator

Calculate ellipse area, circumference approximation, eccentricity, and foci

A = pi ab; C uses Ramanujan's second approximation
Area
75.398224
Circumference approximation
31.730879
Eccentricity
0.745356
Focal distance
4.472136
Ellipse diagramEllipse with labeled major axis, minor axis, center, and foci.major axis = 12minor axis = 8F1F2