
Cylindrical and Spherical CoordinatesConvert rectangular to spherical coordinates using a calculator.Using trigonometric ratios, it can be shown that the cylindrical coordinates \( (r,\theta,z) \) and spherical coordinates \( (\rho,\theta,\phi) \) in Fig.1 are related as follows: \( \rho = \sqrt{r^2+z^2} \) , \( \theta = \theta \) , \( \tan \phi = \dfrac{r}{z} \) (I) \( r = \rho \sin \phi \) , \( \theta = \theta \) , \( z = \rho \cos \phi \) (II) The calculator calculates the spherical coordinates \( \rho \) , \( \theta \) and \( \phi \) given the cylindrical coordinates \( r \) , \( \theta \) and \( z \) using the formulas in I above.
Use Calculator to Convert Cylindrical to Spherical Coordinates1  Enter \( r \), \( \theta \) and \( z \) and press the button "Convert". You may also change the number of decimal places as needed; it has to be a positive integer.Angle \( \theta \) may be entered in radians and degrees. More References and linksMaths Calculators and Solvers. 