Mortar Requirement Calculator Estimate mortar quantity, cement bags, and sand requirement for masonry and plaster work. Wall Length (m) Wall Height (m) Wall Thickness 115mm Wall 230mm Wall Mortar Ratio 1:4 1:5 1:6 Calculate Mortar Requirement Standard Mortar Reference Brickwork Mortar 30% Dry Volume Factor 1.33 Cement Bag 0.035m³