What is the difference between 33 43 53 grade of cement?

Grade 33 cement has a lower strength than grades 43 and 53. Grade 33 cement generally has a lower compressive strength at 28 days and is mostly used for plastering, low-rise structures, and other non-structural applications.

Grade 43 cement has a higher compressive strength than Grade 33 cement, making it suitable for general construction work, precast concrete elements, bridge works, and light weight concrete works. Grade 53 cement has the highest compressive strength among the three grades and is suitable for major construction projects, large concrete works, foundations, dams, and bridges.