Engineers use the Engineering Equation Solver (EES) software to carry out simulations and optimization in companies around the world. EES is widely used in universities to accelerate learning and facilitate deeper investigations into engineering problems.

EES provides a powerful platform for engineering calculations allowing equations to be entered and solved effortlessly. Variables can be assigned units and EES will automatically check the consistency of the equations. Powerful optimization and visualization capabilities allow parametric and design studies to be carried out easily. The properties of 1000's of substances are included in EES as well as a vast library of useful engineering functions and component models. Once developed, EES models can be deployed as executable programs with a professional graphical user interface. EES includes many additional features such as uncertainty propagation, curve fitting routines, macro programming, and integration with other software.