An EXCEL function is being developed that will recover the binding curve of a labile ligand from voltammetric titration data. Published approximate expressions to recover the binding curve of a heterogeneous macromolecular ligand (which leads to fully labile complexes with a metal ion) will be embedded as EXCEL functions. The limiting currents or the shifts of the half-wave potentials in a voltammetric titration experiment will be the user-inputs within the typical framework of an EXCEL spreadsheet. This format will be of special interest to researchers non-specialised in numerical computations and avoids numerical simulation of transport processes at any ligand-to-metal ratio.