Users with a valid license for older versions like 9.x can upgrade to the latest version for approximately $125.00 .

Instead of hunting for a cracked relic (REFPROP 9.1 from 2014), download today. You will have a modern, free, and legally unassailable tool that does everything REFPROP 9.1 could do – and more.

: Despite the limited fluid set, it retains most of the calculation capabilities of the full program, including the ability to generate tables and plots.

NIST historically provided a limited "Mini-REFPROP" for educational use, though full version 9.1 functionality typically requires purchase. Free Alternatives to REFPROP

91 Free New! - Refprop

Users with a valid license for older versions like 9.x can upgrade to the latest version for approximately $125.00 .

Instead of hunting for a cracked relic (REFPROP 9.1 from 2014), download today. You will have a modern, free, and legally unassailable tool that does everything REFPROP 9.1 could do – and more.

: Despite the limited fluid set, it retains most of the calculation capabilities of the full program, including the ability to generate tables and plots.

NIST historically provided a limited "Mini-REFPROP" for educational use, though full version 9.1 functionality typically requires purchase. Free Alternatives to REFPROP

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