Plaster formula
Plaster volume = Wall area × plaster thickness. Convert thickness into metres before multiplying.
Worked example
A 10 m × 3 m wall with 12 mm plaster has area 30 m² and volume 30 × 0.012 = 0.36 m³.
How to use the calculator
Enter wall dimensions and plaster thickness, then review the estimated volume and material quantities.
Where it is used
Internal and external walls, repairs, renovation and preliminary material planning.
Common mistakes
Check both faces where applicable, deduct major openings when required, and use the specified mortar ratio.
Use the Plaster Calculator
Enter your project values and get a quick preliminary calculation.
Engineering note: Results are intended for preliminary estimation, planning and learning. Verify measurements, drawings, specifications, current rates, applicable standards and site conditions before construction or safety-critical decisions.
Frequently Asked Questions
How is plaster quantity calculated?
Calculate wall area, multiply by thickness, then apply the material and mix assumptions.
What thickness should I use?
Use the project specification or drawing.
Does it include wastage?
Check the calculator assumptions.
Can it replace a BOQ?
No; it is a preliminary estimation aid.