The thermal expansion of orthorhombic CaFe2O4-type beta-CaCr2O4, ellinaite, was studied by high temperature in-situ synchrotron X-ray diffraction measurements in the temperature range of 301-973 K at atmospheric pressure. Based on the obtained data, the thermal expansion coefficients of beta-CaCr2O4 were determined as 2.84(3) x 10(-5) K-1, 1.08(1) x 10(-5) K-1, 0.79(1) x 10(-5) K-1, 0.99(1) x 10(-5) K-1 for volume, a-, b- and c axis, respectively. An anisotropic behavior was observed because the axial expansivity for the b axis is smaller than those of the a- and c axis. Combined with available experimental results, the isobaric heat capacity (C-p) of beta-CaCr2O4 was evaluated by using a Kieffer's model with Raman spectroscopy data and compared with previous studies. The isochoric heat capacity (C-v), standard entropy (S-298(0)) and Debye temperature (theta(D)) of beta-CaCr2O4 were also determined.