How do you calculate number of bags of cement required for 1 cubic meter of m15 grade cement concrete as per Indian standard code?

To calculate the number of bags of cement required for 1 cubic meter of M15 grade concrete, first determine the mix ratio, which is typically 1:2:4 (Cement:Sand:Aggregate). For M15 concrete, approximately 1 part cement is needed for every 7.5 parts of total volume (1 + 2 + 4 = 7). Given that one bag of cement weighs 50 kg and has a volume of about 0.035 cubic meters, you would need around 7.5 bags of cement for 1 cubic meter of M15 concrete.