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Microsoft Certified Partner


July 9, 2018

USPExpress .NET Pro SL support has ended.

June 1, 2018

USPExpress .NET Pro SL support will end in July 2018

August 14, 2017

USPExpress .NET Pro M support has ended.


Are you looking for an easy-to-use, fast and lightweight, yet enterprise-level expression parsing tool that you could use in your .NET C#, Visual Basic, C++, Delphi or Fortran applications?
You have just found one!
USPExpress is a series of .NET components aimed to parse and evaluate scientific, engineering and other expressions on-the-fly.
USPExpress products have been widely used in numerous enterprise-level applications in the field of chemical engineering and statistical applications for over 15 years now.


Below is a list of major features of USPExpress products:

  • Can be used with almost any development tool on Microsoft .NET platform, such as Visual C#, Visual Basic, Visual C++, Delphi or Fortran
  • Date and time calculations
  • String data type support (.NET Pro edition only)
  • Custom data types support (.NET Pro edition only)
  • An extensive set of built-in functions...
    • Trigonometrical functions
    • Logarithmical and exponential functions
    • Logical functions, such as IIF(condition, truepart, falsepart)
    • Max and Min functions
    • Random function
    • Date and time functions
  • ...and operators
    • Arithmetic operators
    • Boolean operators
    • Logical operators
    • Bitwise operators
    • Conditional operators
  • Easily customizable with user-defined functions
  • Variable aliasing
  • Linearity expression check
  • Thread-safety (.NET Pro edition only)
  • Comes with detailed documentation, as well as ready-to-run sample programs


We offer free full technical online support via email (parser@unisoftplus.com)
or via phone +7-383-3637002 (9:00-18:00 only; time zone: GMT +6, EST +11).
Your requests are processed within 1 business day.
Do you have a particular feature request? Is there a feature absent that you are looking for?
Don't hesitate and let us know!