Plastering is the process of covering wall surfaces with the help of mortar to provide smooth and durable finishes. In the plastering quantity calculation of the wall, we will calculate the ingredient of mortar.

Mortar is the mixture of cement and sand with water. Plaster’s thickness may vary depending upon the purposes and place of construction. In this article, we will calculate the amount of cement and sand required for plastering a wall of 10 feet by 12 feet with a thickness of 18 mm step by step.

## Plastering quantity calculation of Wall

**Q) Calculate quantity of cement and sand needed to plaster a wall of 12 feet by 12 feet with a mortar thickness 18 mm.**

Given,

Wall Size: 10 feet x 12 feet

Area of Wall = 10 ft × 12 ft = 120 sq. ft. = 11.15 m²

Thickness of Plaster: 18 mm (0.018 m)

**Step 1: Volume of Mortar**

**Volume Calculation:**

Formula: Area × Thickness

Volume = 11.15 m² × 0.018 m = 0.2007 m³

Dry Volume of Mortar (accounting for shrinkage):

Dry Volume = 0.2007 × 1.33 = 0.267 m³

**Step 2: Mix Ratio for Plaster Mortar**

Common Mix Ratio: **1:6 (Cement : Sand)**

Total Parts = 1 + 6 = 7

**Step 3: Cement Calculation**

**Cement Volume:**

Formula: (1/7) × 0.267 m³ = 0.0381 m³**Convert to Bags:**

1 Bag of Cement = 0.035 m³

Cement Bags = 0.0381 / 0.035 = 1.09 bags

Result: Approximately 1.09 bags of cement needed.

**Step 4: Sand Calculation**

Sand Volume:

Formula: (6/7) × 0.267 m³ = 0.2292 m³

Result: Approximately 0.229 m³ of sand needed.

**Summary**

**Cement Required: **1.09 bags (Approx. 1 bag)**Sand Required: **0.229 m³ (Approx. 8.09 cubic feet)

Hence in this way, we can do Plastering quantity calculation of Wall.

## Video on Plastering quantity calculation

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