Verify the inputs
Measure or document each input. If a value is only an estimate, record its source and test a conservative alternative.
Construction/ CALCULATOR
Plaster mix and bag quantity
Estimate dry plaster mix from finished area, average thickness, product consumption and allowance.
FROM ESTIMATE TO ACTION
Use the result, not just the number.
Keep the calculation traceable
Save the input link or copied result together with the date, units and assumptions. A number without its inputs cannot be checked later.
Confirm the decision
Compare the estimate with the related guide, current product data and requirements that apply at your location before buying or building.
Inputs to verify
- Finished plaster area (m²)
- Measure only surfaces receiving this plaster system.
- Average applied thickness (mm)
- Use an average based on substrate checks, not only the nominal coat.
- Product consumption (kg/m²/mm)
- Use the current manufacturer value for the selected product.
- Handling and variation allowance (%)
- Allows for mixing losses and uneven substrate; keep it explicit.
- Bag mass (kg/bag)
- Use the actual package size available to buy.