The gaseous PVT properties of 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) were measured at temperatures from 318.15 K to 348.15 K using the Burnett-isochoric coupled method and at 330.15 K and 380.15 K using the Burnett expansion method, respectively. The maximum uncertainties of the measurements were estimated to be within +/-1.5 kPa for pressure and within +/-5 mK for temperature. A Virial equation for HFC-227ea was developed. The purity of the HFC-227ea sample used in the present measurements was 99.9 mol %.