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🧱 Plaster Calculator
Quickly estimate how much plaster mix, cement, and sand you need for any wall or ceiling.
Calculation Parameters
Surface Type
Wall
Ceiling
Custom
Area Input Method
Enter Dimensions
Enter Total Area
Height (m)
Width (m)
Total Area (m²)
Plaster Thickness (mm)
Standard: 12mm (walls), 10mm (ceilings)
Cement:Sand Mix Ratio
1:3 (Rich Mix)
1:4 (General Purpose)
1:5 (Ceilings)
1:6 (External Rendering)
Custom Ratio
Cement Parts
Sand Parts
Include 10% Wastage
Display Units
Metric (kg, m³)
Imperial (lbs, ft³)
Calculate
Results
Total Plaster Volume
0 m³
Cement Required
0 kg
Approx. 0 bags (50kg each)
Sand Required
0 m³
Mix Ratio: 1:4
Enter your parameters and click "Calculate" to see results
Standard Plaster Thickness
Surface Type
Common Thickness
Interior Wall
12 mm
Exterior Wall
15–20 mm
Ceiling
10 mm
RCC Surface
6–12 mm
Tips for Accurate Estimation
Add 10–15% extra for surface irregularities
Mix plaster in small batches to avoid waste
Always dampen the surface before application
Use proper PPE (mask, gloves, goggles)
Check manufacturer recommendations
How to Use the Plaster Calculator
Enter wall/ceiling dimensions or total area
Select thickness of plaster layer
Choose mix ratio (e.g. 1:5 for cement:sand)
Click "Calculate" button
View results with material breakdown