If you want to made a DIY sphere, you need to unfold the sphere to 2D shapes, or, more strictly speaking, approximate the sphere using petals, or "orange peels" (also called the lunes) on the plane. The calculator calculates basic parameters of such 2D peel and displays coordinates of points for drawing one peel on a plane.

Transforms 3d coordinate from / to Cartesian, Cylindrical and Spherical coordinate systems.

This online calculator calculates the general form of the equation of a plane passing through three points