Thermo-Calc has over the past 30 years gained a world-wide reputation as the best and most powerful software package for thermodynamic calculations. It is widely used for a variety of calculations including calculating: Stable and meta-stable heterogeneous phase equilibria; Amounts of phases and their compositions; Thermochemical data such as enthalpies, heat capacity and activities; Transformation temperatures, such as liquidus and solidus; Driving force for phase transformations; Phase diagrams (binary, ternary and multi-component); Solidification applying the Scheil-Gulliver model; Thermodynamic properties of chemical reactions.