The amount adsorbed at low coverage is mainly controlled by the adsorption energy and the maximum coverage by the hard-disk area. Lateral interactions between adsorbed molecules control how fast the adsorption isotherm reaches its asymptotic value. While one experimental data-set for SA can be adequately described with only the adsorption energy and hard-disk area, two other data-sets require the lateral interactions to be accounted for. The adsorption isotherm for GMS and GMO are similar, in contrast with previous experimental results regarding the packing of saturated and unsaturated surfactants. We propose that these differences in coverage that are found experimentally, are mainly due to differences in the kinetic barriers to the formation of high-coverage monolayers, with differences in aggregation in non-polar solvents and differences in lateral interactions playing a secondary role. These factors could be investigated in future work. Finally, the calculated adsorption energies from the PMFs have been validated through HFRR experiments and the Jahanmir and Beltzer model. A good agreement is obtained between the computational results and the experimental estimation of the adsorption energy for the OFMs (SA and GMS) with saturated tailgroups, while the adsorption energy is overestimated by around 10 KJ mol -1