Excess molar volumes, V-E, measured at the temperature 313.15 K in a dilution dilatometer are reported for binary mixtures (N-methylacetamide + water), (N-methylacetamide + methanol), and for the ternary mixture (N-methylacetamide + methanol + water). The results have been analysed using various correlation equations and the possibility of predicting the ternary V-E values from the binary ones is examined.