Forget unit conversion errors. CATT3 allows toggling between:

Thermo-Calc is a powerful software package used for thermodynamic and phase diagram calculations for multi‑component systems of practical importance. A free student version is available for download from the Thermo‑Calc website with no licensing required.

CATT3 is a legacy Windows-based application designed to accompany engineering textbooks, most notably Fundamentals of Classical Thermodynamics by Van Wylen, Sonntag, and Borgnakke. Key Functions

The benefits of using CATT3 include:

At its core, is a lightweight software program designed to help students and engineers quickly look up and calculate thermodynamic properties of various substances.

Includes water, refrigerants (like R-134a, R-12, R-22), ammonia, nitrogen, oxygen, and ideal gases.