: The underlying Fortran code was highly optimized in version 10, resulting in faster calculation speeds and better convergence for complex mixtures. Free Options vs. Paid Version
, the full database is a paid resource. NIST charges for the software to support the ongoing research and maintenance required for its high-accuracy models. Full Version Cost : Currently, a single-user license for NIST REFPROP 10 refprop 10 free download 2021
Refprop Mini: NIST previously offered a "Mini-Refprop" version for free. While limited to a few fluids (like water and air), it is a safe and legal way to test the interface. : The underlying Fortran code was highly optimized
REFPROP 10 (Reference Fluid Thermodynamic and Transport Properties) is the gold standard for researchers and engineers needing high-accuracy thermophysical property data for fluids. Version 10, released by NIST, introduced significant improvements over previous versions, including new equations of state and expanded fluid mixtures. Because it is a highly specialized, proprietary software developed by the National Institute of Standards and Technology, it is not available as a free download. NIST charges for the software to support the
If you are considering the full version, Version 10 (released in 2018) offers significant improvements over previous iterations: REFPROP | NIST
