Welcome to CoolProp

These pages help you to get started using CoolProp and provide detailed information for the returning user. Please feel free to browse the pages and use the menu on the left to navigate on this website.

Environments Supported

Programming Languages:


  • 32-bit/64-bit
  • Windows, Linux, OSX, Raspberry PI, VxWorks Compact Rio, etc. (if you can compile C++ on it, CoolProp will run)

High-Level Interface Example

In most languages, the code to calculate density D of Nitrogen at a temperature T of 298 K and a pressure P of 101325 Pa is something like:

rho = PropsSI('D', 'T', 298.15, 'P', 101325, 'Nitrogen')

See more examples of PropsSI usage at High-Level interface or Examples


Projects Using CoolProp

Main Developers


Please do not email the developers directly, see Help above for assistance (this way the correspondence is google-able)

The primary developers are:

Please be so kind and cite our work in your publication: Citation information.


labothap ORCNext

Herrick Maple

DTU Mechanical Engineering - Section for Thermal Energy IPU Refrigeration and Energy Technology

License Information

CoolProp has flexible licensing terms and you can use it for commercial projects and academic work free of charge. Have a look at the actual license, if you are in doubt.