CoordinateTransform

CoordinateTransform[t, pt] performs the coordinate transformation t on the point pt.

CoordinateTransform[t, {pt1, pt2, ...}] transforms several points.

Examples

Convert Cartesian to polar:

CoordinateTransform["Cartesian" -> "Polar", {1, 1}]
(* {Sqrt[2], Pi/4} *)

Convert spherical to Cartesian:

CoordinateTransform["Spherical" -> "Cartesian", {1, Pi/4, Pi/4}]

Please visit the official Wolfram Language Reference for more details.