- free access to thermochemical software
and compound databases.

List of the pure substances in FactPS - the pure substances database.
NEW! ViewData lists tables of thermodynamic data and phase transitions.
Properties of a species or chemical reaction. NEW! Advanced calculations where chemical reactions may be non-isothermal, non-standard state, adiabatic, high pressure, etc.

Chemical equilibria calculation of a dilute aqueous solution with pure solids.   Chemical equilibria calculations of systems including gases, pure substances and real solutions.

Isothermal predominance area diagram. Eh vs pH Pourbaix diagram. Interactive phase diagrams and search engine

The FACT-Web programs offer free but very limited interaction with FactSage. This service may be discontinued at any time without notice. The programs are offered for demonstration purposes only. Many of the features available in the full FactSage package have been removed or diluted.


To cite FactSage in a publication, please use the following:

C. W. Bale, E. Bélisle, P. Chartrand, S. A. Decterov, G. Eriksson, K. Hack, I. H. Jung, Y. B. Kang, J. Melançon, A. D. Pelton, C. Robelin and S. Petersen, FactSage Thermochemical Software and Databases - Recent Developments, Calphad, vol. 33, pp 295-311, 2009 <www.factsage.com>


If you employ the results of Fact-Web calculations in a publication make sure that you are aware of the limitations of the calculation.  This is particularly important in Equilib-Web which does not have access to real solution data.

To cite Fact-Web or one of its modules in a publication please use the following reference:

C. W. Bale and E. Bélisle, Fact-Web suite of interactive programs, www.factsage.com