The heat capacities of La1-xCaxCrO3, x = 0.10, 0.20, and 0.30, were measured with an adiabatic shield calorimeter at temperatures from 298.15 K to around 1000 K. Thermodynamic functions have been derived and C-p,C-m, Delta(298.15K)(T) H-m degrees, and Delta(298.15K)(T) S-m degrees were found to be nearly independent of the degree of CaCrO3 substitution. The average values of C-p,C-m, Delta(298.15K)(T) H-m degrees, and Delta(298.15K)(T) S-m degrees at T = 900 K for La1-xCaxCrO3, x = (0.00, 0.10, 0.20, and 0.30), are 127.96 J . K-1. mol(-1), 73381 J . mol(-1), and 132.72 J . K-1. mol(-1). A lambda-type contribution to the heat capacity which reflects a phase transition from an orthorhombic to a rhombohedral structure was observed for all compositions. The temperature, the enthalpy, and the entropy of the transition are 568 K, 405 J . mol(-1) and 0.71 J . K-1. mol(-1) for x = 0.10; 629 K, 255 J . mol(-1), and 0.40 J . K-1. mol(-1) for x = 0.20; and 722 K, 326 J . mol(-1), and 0.45 J . K-1. mol(-1) for x = 0.30. An additional heat capacity anomaly was found near T = 850 K for x = (0.10 and 0.20) {p(He) = 0.6 kPa} and near T = 830 K for x = 0.30 (in air). The origin of this anomaly is discussed.