### cement concrete calculator | pcc calculator | rcc

Concrete grade Proportion of cement : sand : stone pieces Expected compressive strength at 28 days; M10 or M100: 1 : 3 : 6: 10 N/mm 2 or 100 Kg/cm 2: M15 or M150: 1 : 2 : 4: 15 N/mm 2 or 150 Kg/cm 2: M20 or M200: 1 : 1.5 : 3: 20 N/mm 2 or 200 Kg/cm 2: M25 or M250: 1 : 1 : 2: 25 N/mm 2 or 250 Kg/cm 2

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