This program calculates molar mass and percent of each element for the given chemical formula. The program contains perl module MMCalc.pm and two perl scripts, mmcalc and gmmcalc. mmcalc is a console version of calculator, while gmmcalc is GUI version using Gtk2/Gtk3.

Examples of valid formulae: H2O, CuSO4*5h2o, hgcl2, c o, In(NO3)3*4.5H2O, Rb16Cd25, 39Sb36. Acronyms are also supported: [Zn2(dabco)(bdc)2]*4DMF, Pd(acac)2, h4edta. It is possible to add, remove and change the acronyms. Using of parentheses, square brackets as well as braces is acceptable.