The Ellipsoid Calculator provides equations and data to compute the volume, surface area , mass and weight of ellipsoids including the specials cases of an ellipsoid: the oblate spheroid and the sphere.
An ellipsoid has three axes if different lengths. However each axis has the cross-section of an ellipse. When the two of the axes have the same length, the formulas are simplified to create an oblate spheroid. When all three axes are the same length, the result is a perfect sphere.