EES – FEATURES
Standard version:
- Solves up to 6,000 simultaneous non-linear equations (12,000 in pro version)
- Equations can be entered in any order with built-in editor
- Extremely fast computational speed
- High accuracy thermodynamic and transport functions for many fluids
- T-s, P-v, P-h, and other types of property plots
- SI and English units
- Unit conversion and automatic unit consistency checking
- Parametric studies with spreadsheet-like table
- Single and multi-variable optimization capability
- User-defined functions, procedures, modules, subprograms and DLLs
- If-Then-Else and other logic constructs
- Multi-dimensional optimization
- Uncertainty analysis
- Linear and non-linear regression
- Automatic interpolation from tabular data files
- Professional plotting (2-D, contour, and 3-D) with automatic updating
- LaTeX, PDF, as well as printed output
- Graphical user input/output capabilities with Diagram window
The professional version offers additional features including:
- Animation capabilities
- Ability to make stand-alone programs
- Ability to solve larger problems
- Genetic optimization
Further information:
Download EES professional features
Download EES Short description
Watch EES Short movie

