codata is a Fortran library providing the fundamental physical constants according to CODATA.

• Man pages: https://github.com/MilanSkocic/codata/tree/main/doc
• Autogenerated documentation with Sphinx: https://milanskocic.github.io/codata/
• Examples: https://github.com/MilanSkocic/codata/tree/main/example
• Source code: https://github.com/MilanSkocic/codata
• Python wrapper: https://pypi.org/project/pycodata
• Binaries: https://github.com/MilanSkocic/codata/releases

It provides:

• codata constants 2022 (integrated in stdlib)
• codata constants 2018
• codata constants 2014
• codata constants 2010

Notes:

• If you need older values for the CODATA constants you can use codata otherwise use the standard library.
• If you only need sources for the codata constants that you can integrate directly in your sources you may be interested by https://github.com/vmagnin/fundamental_constants.