3D paintingDraw the actual room outline, add doors and windows…Loading…
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Work out how many bags of plaster or skim coat you need. Enter the area, the type and the layer thickness — the calculator returns the mass and the number of bags including a waste allowance.
Calculate walls and ceiling from the actual room shape.
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walls or ceiling
in millimetres
by plaster type
final count
Mass = sum(area × thickness in mm) × consumption kg/m²/mm × (1 + allowance/100). Bags = round up(mass / bag weight).Worked example
Worked example using the form's default values.
Enter consumption, coverage, dimensions and pack sizes from the product label or data sheet. A preset fills editable fields; the calculation uses the values you enter.
The requirement includes your allowance. Purchase quantities round up to whole pieces or packages; purchase surplus is not another allowance to add.
The result estimates quantities. Check structural layout, system compatibility and installation in the design and manufacturer documentation.
Yes. Additional surfaces or sections are summed within the chosen scope. Do not enter the same element twice. Purchase different colours and products separately.
No. Amounts come from your inputs. Enter your supplier quote; a zero price omits the cost estimate and does not mean free material.
Plaster consumption depends on the material, the layer thickness and the area. Consumption figures differ between manufacturers, so for precise calculations enter the value from the data sheet. The calculator converts the mass into a number of bags and adds an allowance for losses.
