The current stable version (Version 10) is available for $325.00 on the Official NIST Shop .
Users who already own Version 9.x can upgrade to Version 10 for a discounted price of $125.00 . nist refprop 91 download hot
While it has been officially superseded by , many researchers and engineers still seek version 9.1 for its specific compatibility with legacy systems and established workflows. Official Download and Acquisition The current stable version (Version 10) is available
If you have previously purchased 9.1 and need a replacement installer for a reinstallation, NIST staff may provide a link upon request via email at ian.bell@nist.gov or data@nist.gov . Free Trial: MINI-REFPROP Official Download and Acquisition If you have previously
NIST REFPROP 9.1: Comprehensive Download and Usage Guide (REFerence Fluid PROPerties) is a gold-standard software tool developed by the National Institute of Standards and Technology (NIST) . It provides highly accurate thermodynamic and transport properties for industrially important fluids and their mixtures.
NIST REFPROP is and is not available for free download as a full version.
For those looking to test the software for free, NIST offers , a limited version of the database. REFPROP 10 Single User - Shop NIST