The NMR frequencies of Fe57 were measured in europium iron garnet between 4.2 and 370°K. From these data and from measurements of the total magnetization, the magnetizations of the a, d, and c sublattices are calculated. A spin-wave analysis at low temperatures yields D=28.4+/-0.8 cm-1, as compared to D=30.0+/-0.6 cm-1 for yttrium iron garnet. The temperature dependence of the exchange field acting on Eu+3 confirms that interactions between the a and c sublattices are negligible, and shows that JacJcd<0.03. Using, in addition, the information from Mössbauer studies on europium garnets, one calculates Jcd=-2.74 cm-1 and J'cd=-0.19 cm-1, where these parameters represent respectively the exchange with the nearest and next-nearest neighbors on the d sublattice.