EES (pronounced 'ease') is a general equation-solving program that can numerically solve thousands of coupled non-linear algebraic and differential equations. The program can also be used to solve differential and integral equations, do optimization, provide uncertainty analyses, perform linear and non-linear regression, convert units, check unit consistency, and generate publication-quality plots. A major feature of EES is the high accuracy thermodynamic and transport property database that is provided for hundreds of substances in a manner that allows it to be used with the equation solving capability.

Basic Features Provided in All Licence Types
  • Operates with Microsoft Windows operating systems (XP, 7, 8, 10 and 11)
  • Solves thousands of non-linear equations
  • Equations can be entered in any order
  • Fast computational speed
  • High accuracy thermodynamic and transport functions for 100's of fluids. View list of fluids
  • Unit conversion and automatic unit consistency checking
  • Parametric studies with spreadsheet-like table
  • Single and multi-variable optimization capability
  • Uncertainty analysis and regression capability
  • Lookup tables with ability to interpolate user entered data
  • String variables and functions to provide string manipulation
  • High-quality plotting (2-D, contour, and 3-D) with automatic updating
  • Automatic generation of T-s, T-v, T-h, P-v, P-h, P-T and other types of property plots
  • LaTeX, PDF, as well as printed output
  • Ability to create, save user-written libraries of Functions and Procedures
  • Heat transfer library functions for conduction, convection, and radiation
Types of Licenses YouTube Tutorials