The measurements of the liquid-liquid equilibria implied in the reaction system to yield glycerol carbonate from ethylene carbonate and glycerol were performed. First, data for the ternary systems consisting of ethylene carbonate. +. ethylene glycol. +. glycerol as well as ethylene carbonate. +. glycerol carbonate. +. glycerol at 313.2, 318.2 and 323.2. K and atmospheric pressure were acquired. Furthermore, the quaternary equilibrium involving both products of the reaction, i.e., ethylene carbonate. +. ethylene glycol. +. glycerol carbonate. +. glycerol, was evaluated under the same conditions. All the data experimental data were correlated with the NRTL model with root-mean square deviations of about 0.03 for all the systems tested. © 2014 The Institution of Chemical Engineers.