FreeNo signup
Plaster Calculator
Estimate plaster weight and bags from wall area, average layer thickness, and the product's stated usage.
- Bags
- 10
- Mix weight
- 280.5 kg
How the calculation works
Weight = area × thickness/10 × usage at 10 mm × (1 + waste/100). Bag count is rounded up.
Inputs
- Area, m²
- Thickness, mm
- Usage, kg/m² at 10 mm
- Bag weight, kg
- Waste, %
Calculation details
For 30 m² at 10 mm and usage of 8.5 kg/m², net material is 255 kg. Gypsum and cement products have different coverage.
Use the measured average wall thickness and the usage and bag weight from the package. Subtract windows and doors from the area first.
Related calculators
- Air Conditioner BTU Calculatorair conditioner btu calculatorOpen →
- Appliance Energy Calculatorappliance energy calculatorOpen →
- Brick Calculatorbrick calculatorOpen →
- Concrete Block Calculatorconcrete block calculatorOpen →
- Concrete Calculatorconcrete calculatorOpen →
- Drywall Calculatordrywall calculatorOpen →
Other sections
Updated: 2026-10-02