1. What is Plaster Material Calculation?

The plaster material calculation determines the quantity of cement and sand required for plastering based on the area to be covered, plaster thickness, and the mix ratio of cement to sand.

2. How Does the Calculator Work?

The calculator uses these formulas:

Where:

• Area — Surface area to be plastered (m²)
• Thickness — Plaster thickness (meters)
• Ratio — Cement to sand mix ratio (e.g., 1:4 or 1:6)
• 1.27 — Dry volume factor
• 1440 — Cement density (kg/m³)
• 1600 — Sand density (kg/m³)

Explanation: The calculation accounts for both the wet and dry volumes of materials, and the specified mix ratio.

3. Importance of Accurate Calculation

Details: Accurate material calculation ensures you purchase the right quantities, avoiding wastage or shortage during construction.

4. Using the Calculator

Tips: Enter the area in square meters, thickness in meters, and the mix ratio (e.g., 4 for 1:4 cement:sand ratio). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical mix ratio for plastering?
A: Common ratios are 1:4 (cement:sand) for external plaster and 1:6 for internal plaster.

Q2: Why is there a 1.27 factor in the calculation?
A: This accounts for the dry volume being about 27% more than the wet volume due to voids in sand.

Q3: How do I measure the area accurately?
A: Measure length and height of each wall, calculate area for each, and sum them up. Deduct openings like doors and windows.

Q4: What thickness should I use for plaster?
A: Typical thickness is 12mm (0.012m) for internal walls and 20mm (0.02m) for external walls.

Q5: How should I adjust for wastage?
A: It's recommended to add 5-10% extra to the calculated quantities to account for wastage during application.