The integrated exploration of electronic, magnetic and elastic properties in cubic and orthorhombic phases provides a holistic characterization of the rare-earth perovskite compound, SmMnO3. Through a comprehensive DFT study, this research explores the electronic, magnetic and elastic behaviors of the material in different phases. Using GGA-PBE and mBJ-GGA-PBE methods, the analysis confirms the semi-metallic nature of both structural forms, highlighting their potential applications in spintronics and magnetic devices.