Eos Utilities


EosFit Calculator

This is a GUI built on the Eos cfml library to act as a rapid P-V and P-V-T calculator. You can use it to calculate P from V and T, V from T and P, etc.

The calculator saves and reads in EoS parameters with the 'eos' files, so you can use EoS you have determined in EosFit-7c and EosFit-GUI.

Latest Update: June 2021
New features in this version:
  • Includes all updates to EoS models applied to EoSFit-7c and EosFit-GUI.
  • Display of heat capacity calculated from EoS parameters.


The EosFit calculator is automatically installed when you install the EosFit program suite in any system: MAC, Linux or Windows.

EosFit-Pinc

This is a GUI built on the Eos cfml library to do rapid calculations for elastically isotropic spherical host-inclusion systems. It duplicates some of the functions in the isomeke utility of the EosFit7c program. EosFit-Pinc can:
  • Read EoS as .eos files from any other EosFit7 program.
  • Import EoS from Thermocalc.
  • Calculate final inclusion pressures from known entrapment P and T.
  • Calculate entrapment isomekes from measured remnant inclusion pressures.
  • Calculate isomekes and isochors of the two phases.

EosFit-Pinc is only available for Windows. The methods and program are described in: Angel RJ, Mazzucchelli ML, Alvaro M, Nestola F (2017) EosFit-Pinc: A simple GUI for host-inclusion elastic thermobarometry. American Mineralogist, 102, 1957-1960.


Latest update: February 2026.
New features in this version:
  • The algorithm for finding isomeke pressures has been changed to prevent failures when the isomekes are strongly curved, for example for quartz in garnet approaching the alpha-beta boundary, or when the bulk moduli of the two phases are nearly equal. This means that you may get slightly different results for these problem cases compared to the 2021 release versions of EosFit-Pinc and EosFit7c.
  • Uncertainties are calculated in both Pinc and Ptrap from the uncertainties in the parameters of the two EoS.
  • Improved error messages.
For full details of changes, please consult the help system. These changes have also been included in the 2026 update of the EntraPT software.

Installation:
  • If you have an earlier version, uninstall it by using the Uninstall utility in Windows.
  • Download the EosFit-Pinc installer and run it.
  • It will install the EosFit-Pinc program, some example .eos files and the EoSFit-7 help system.
  • We recommend installation in C:\Program Files (x86)\EosFit_Pinc.
  • Read the help system to understand how the program works and the basis for the calculations.