New approximate simplifications are made to the high flux correction matrix for the film model and the penetration model, as derived from the Maxwell-Stefan mass transfer theory. Approximations are valid for both predetermined total flux, when explicit method results, and equivalently when total fluxes must be iterated. These presented simplifications are simple enough so as to be always includable in the mass transfer calculations, and the zero total flux assumption (equimolar transfer) is never needed for computational reasons in practical calculations.