PLASTER & MORTAR · 9 TOOLS
Plaster & Mortar Calculators
Plaster and mortar calculators using the dry-volume method common on site: wall plaster with reveals, ceilings with beams, internal plaster with tiled areas deducted, two-coat external plaster, sand-cement-lime and premixed render, whole-building cement and sand quantities, and a wastage calculator that shows where the extra plaster goes.
Ceiling Plaster CalculatorCalculate ceiling plaster area including beam soffits and sides, with cement bags and sand for a thin, rich ceiling coat (typically 6 mm, 1:3). Free accountCement Quantity CalculatorCalculate total cement and sand for plastering a building (internal walls, external walls and ceilings, each with its own thickness and mix) in bags and kg.External Plaster CalculatorCalculate external (facade) plaster in two coats (base and finish, each with its own thickness and mix) with cement bags, sand and approximate scaffold area. Free accountInternal Plaster CalculatorCalculate internal wall plaster from room perimeters and height, deducting openings, tiled skirting and dado tiling, with cement bags and sand. Free accountPlaster Wastage CalculatorCalculate plaster wastage by cause (uneven walls, droppings and rebound, mixing losses) as a percentage, with plaster to mix and cement and sand to order.Plastering CalculatorCalculate cement bags and sand for wall and ceiling plaster from area, thickness and mix ratio (1:3, 1:4, 1:6), using the dry volume method. Working shown.Render Quantity CalculatorCalculate render quantities for scratch and top coats: cement, lime and sand for 1:1:6 and other render mixes, or premixed render bags from kg per m² per mm. Free accountSand Quantity CalculatorCalculate sand for plastering (and extra for mortar) in m³, cubic feet (cft), tonnes and truck loads, with bulking of damp sand for ordering by loose volume.Wall Plaster CalculatorCalculate wall plaster area for one or both faces with doors and windows deducted and reveals (jambs, heads, sills) added, plus cement bags and sand.