Three methods for determining the permeability of suspensions in the compression range are compared, with use of calcium carbonate suspensions. The three methods are as follows : (a) the method proposed by Michaels and Bolger (1962) considering the results obtained from some batch tests of sedimentation, (b) an approximate method presented elsewhere (Font, R. Chem. Eng. Sci. 1991, 46, 2473-2482) assuming a possible distribution concentration inside the sediment, and (c) a method considered in this paper, based on the determination of the solids concentration in a batch test. With the latter method, values of permeability can be determined at different solids concentration and times. A discussion of the variation of the permeability values is also presented.