The heat capacities at constant pressure of 1,2-ethanediol (1,2-EtD), 1,3-propanediol (1,3-PrD), 1,4-butanediol (1,4-BuD), 1,5-pentanediol (1,5-PeD), and 1,7-heptanediol (1,7-HpD) were measured within the temperature range from (293.15 to 353.15) K. The heat capacities of three other compounds, 1,6-hexanediol (1,6-HxD), 1,8-octanediol (1,8-OcD), and 1,9-nonanediol (1,9-NoD), were also measured between their melting point and 353.15 K. All measurements were performed by means of a DSC III (Setaram) differential scanning calorimeter. Assuming that the molar heat capacity shows an additive character, a simple equation was proposed that allows one to describe C-p values of liquid alpha,omega-alkanediols as a function of temperature and the alkyl chain length with an accuracy below 1%.