Molecular dipole moments of five polar liquid crystalline compounds have been determined by measuring the dielectric constants and refractive indices of solutions of the compounds in a non-polar solvent p-xylene. Dipole moment of an isolated molecule is evaluated by extrapolation to infinite dilution. Mean polarizability and polarizability anisotropy were also calculated from bond additivity rule. From the crystal structure data, tomic charge distributions for two of the five compounds were calculated by different empirical methods using molecular orbital theroy. The calculated values of dipole moments were compared with our experimental data.