plaster costing Plaster Costing For Calculating Area of Plaster Enter Length : [Feet] Enter Width : [Feet] Thickness of Plaster : Grade of footing : Area of Plaster : Volume of Mortar = Plaster Area x Plaster Thickness in Meter. Volume of Mortar : M3 Volume of Mortar : M3[Note : Increases by 30% to fillup join and fillup surface] Dry Volume of Mortar : M3[Note : Increases by 25% of total dry volume] Amount of Cement Required : bags Quantity of Sand Required : Kg Quantity of Sand Required : Ton