Geochemical Reaction Rate Calculator

  • Online Rates Calculator

  • This Rate Calculator was kindly provided by Dr. Yilun Zhang and Kevin Tu to help fellow students in geochemistry. Please refer to this article for details and cite in your publications:

    Zhang YL, Hu B, Teng YG, Zhu C (2019) A library of BASIC scripts of rate equations for geochemical modeling using ᴘʜʀᴇᴇǫᴄ. Computers & Geosciences, v133, DOI

    Please send comments or corrections to Professor Chen Zhu (

    This material was partly supported by NSF grant EAR-1926734, the endowment for the Haydn Murray Chair, and the Office of the Vice Provost for Research of Indiana University.


    This material was prepared, in part, sponsored by an agency of the United States Government or Indiana University. Neither the United States Government, nor Indiana University, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.