Open-source thermodynamic and transport properties database

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Project description

Welcome to CoolProp

CoolProp is a thermophysical property database and wrappers for a selection of programming environments. It offers similar functionality to REFPROP, but CoolProp is open-source and free. It was originally developed by Ian Bell, at the time a post-doc at the University of Liege, in Liege, Belgium.

CoolProp has flexible licensing terms: Commercial - ok! Academic? - ok!
For Python, get the latest release via pip install coolprop
... other binaries are available from SourceForge
There is also a bleeding edge nightly build of the development version.
The documentation is available for the latest release and the development version
For any kind of question regarding CoolProp and its usage, you can ask the CoolProp Discussions
... you might also find answers in our FAQ
If you found a bug or have an issue that requires the developers to become active, please file an issue in our issue tracker
Contributions to this project are welcomed and encouraged! If you wish to contribute bug fixes, patches, or new features, wrappers, or material properties, please submit a Pull Request with your code.
If you are new to Git and Github, please see the CoolProp Wiki for guidance on becoming a contributor to the project.

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This version

8.0.0

Jun 27, 2026

7.2.0

Nov 1, 2025

7.1.0

Sep 20, 2025

7.0.0

Aug 9, 2025

6.8.0

Apr 21, 2025

6.7.0

Feb 22, 2025

6.6.0

Nov 29, 2023

6.5.0.post1

Aug 8, 2023

6.5.0

Aug 6, 2023

6.4.3.post1

Dec 16, 2022

6.4.3

Dec 16, 2022

6.4.2

Dec 13, 2022

6.4.1

Aug 4, 2020

6.4.0

May 12, 2020

6.3.0

May 19, 2019

6.2.1

Oct 28, 2018

6.2.0

Oct 28, 2018

6.1.0

Oct 25, 2016

6.0.0

May 12, 2016

5.1.2

Jan 9, 2016

5.1.1

Jul 15, 2015

5.1.0

Apr 27, 2015

5.0.8

Mar 1, 2015

5.0.7

Feb 11, 2015

5.0.6

Jan 12, 2015

5.0.5

Jan 1, 2015

5.0.4

Dec 20, 2014

5.0.3

Dec 6, 2014

5.0.2

Dec 4, 2014

5.0.1

Dec 3, 2014

5.0.0

Dec 3, 2014

4.2.5

Aug 10, 2014

4.2.4

Jul 28, 2014

4.2.3

Jul 2, 2014

4.2.2

Jun 25, 2014

4.2.1

Jun 6, 2014

4.2.0

Apr 24, 2014

4.1.2

Feb 14, 2014

4.1.1

Feb 13, 2014

4.1.0

Feb 10, 2014

4.0.0

Dec 6, 2013

4.0.0beta pre-release

Nov 4, 2013

3.3.0

Aug 5, 2013

3.2.0

Jun 27, 2013

3.1.2

May 25, 2013

3.1.1

May 8, 2013

3.1

May 3, 2013

3.0.1

Mar 10, 2013

2.5

Jan 11, 2013

2.4

Dec 22, 2012

2.3

Nov 24, 2012

2.2.5

Nov 15, 2012

2.2.4

Nov 8, 2012

2.2.3

Nov 1, 2012

2.2.2

Oct 24, 2012

2.2.1

Oct 23, 2012

2.2.0

Oct 22, 2012

2.1

Oct 3, 2012

2.0.6

Aug 22, 2012

2.0.5

Aug 17, 2012

2.0.4

Aug 8, 2012

2.0.2

Aug 7, 2012

2.0.1

Jul 24, 2012

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CoolProp 8.0.0

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