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


Open-Source Projects Using CoolProp

Main Developers

The primary developers are:


labothap ORCNext

Herrick Maple

DTU Mechanical Engineering - Section for Thermal Energy