How the Plaster Calculator works
Mortar = Area × Thickness; dry volume = wet × 1.27; cement and sand split by ratio.
How to use this calculator
- Sign up free and verify your email to unlock the calculator.
- Choose Metric (m, mm, m³, kg) or Imperial (ft, in, cft, lb) units.
- Enter the plaster area, thickness, mix.
- Results update instantly — read the quantities in the Results panel.
- Add a wastage allowance and confirm against your drawings and specifications before ordering.
Typical uses
Internal and external cement plaster.
Assumptions & limitations
Results are planning estimates based on standard assumptions for finishes work. They do not replace structural design, site measurement or project specifications. Material densities, wastage and mix proportions vary by region and supplier.
Frequently asked questions
- How does the Plaster Calculator work?
- Mortar = Area × Thickness; dry volume = wet × 1.27; cement and sand split by ratio.
- Can I use the Plaster Calculator in feet and inches?
- Yes. Switch to Imperial and enter feet, inches, square feet or pounds — the calculator converts automatically and shows results in imperial units.
- When should I use the Plaster Calculator?
- Internal and external cement plaster.
- Is this construction calculator free?
- Yes. All CM PRO construction calculators are free — you only need to sign up and verify your email.
Related searches: plaster calculator, cement plaster quantity, sand for plaster.
