How much sand required for M20 concrete in cubic metre step 7 :-calculate sand required for 1 cubic metre of M20 concrete in cubic metre is equal to 1.5/5 × 1.54 = 0.42 m3. Ans. :-0.42 m3 quantity of sand is required for 1 cubic metre of M20 concrete. How much sand required for M20 concrete in Kgs