Computers play an important role in analyzing and designing of modern DC-DC power converters. This tutorial paper shows how the widely used analysis techniques of averaging and linearisation can be applied to DC-DC converters with the aid of computers. Obtained dynamical equations may then be used for control design. This paper composed of two parts. First part shows how ready to use software packages (such as PLECS®) and MATLAB® programming can be used to obtain the converter dynamics. Second part of the paper introduces a user friendly MATLAB toolbox to extract the DC-DC converter dynamics. Developed toolbox can be used for educational and/or industrial purposes. This paper can be a good reference for researchers involved in DC-DC converters dynamics and control.