Density is one of the simple and accurate techniques to obtain the information regarding the nature of the transition and pre transitional effects across any phase transformation in liquid crystals. Density is measured with temperature in well known alkoxy benzoic acids with alkoxy chain number from 3 to 12 and 16. Even though the density measurements are carried on some of the homologues in this series, we have carried out systematic studies on all the homologues available and the results are compared with the literature values. Whereever there is deviation the reasons for such deviations are explained.