First-principles calculations are performed to examine the physical features of full Heusler ln2MnW. The WIEN2K code is utilized with the variety of approximations, including the GGA and GGA + U, to examine the structural, electronic, and magnetic properties. The unit cell is optimized to achieve the ground state energy level. The calculated ΔH for In2MnW is -0.189 eV. This negative ΔH value signifies the thermodynamic stability of the compound. The metallic behavior of the investigated compound is confirmed by the calculated band structure (BS) with both potentials. These potentials are also used to calculate the total density of the state, which confirm their metallic nature. Total magnetic moment value is recorded as 4.3 µB while addition of U parameter slightly enhances its value to 4.4 µB. These studied properties indicate that ln2MnW has a metallic ferromagnetic character and is ideally appropriate for the usage of mass storage devices as a ferromagnetic material.