As a Civil Engineer on site, you should be able to know the amount of cement require for plastering a Particular Area covered.

Knowing this will prevent you from running loss. I will explain to you how to calculate the amount of cement require for plastering

We use the following mix ratio below for plastering

Wall plastering = 1:6

Ceiling plastering = 1:4

External wall plastering = 1:4

Internal wall plastering = 1:5

Repair wall plastering = 1:3

All in {Cement : Sand}

**Plastering range i.e. thickness** = 12mm – 15mm

12mm/1000 = 0.012m

Calculating bags of cement require for 100m²

Volume of plastering = 100m² * 0.012m

= 1.2m³

Using mix ratio 1:6

Total ratio = 7

Cement ratio = 1/7

= 0.143

1.2m3 * 0.143 = 0.171m³

Addition of bulk moisture 35%

0.35 * 0.171m³ = 0.06m³

Addition of waste 20%

0.20 * 0.171m³ = 0.034m³

Total = 0.171m³ + 0.06m³ + 0.034m³

= 0.265m³

1 bag of cement (density) = 1440kg/m³

Weight of cement = 50kg

= 50/1440 = 0.0347m³

No. of bags of cement = 0.265/0.0347

= 7.67bags

**100m² area covered = 7.67 bags**

**Xm² area covered = 1 bag**

**1 bag of cement will cover 13.04m² Area**

Now assuming 50m² area is require to be plaster on site. Calculating the amount of cement to be use will be.

**13.04m² area covered = 1 bags**

**50m² area covered = X bag**

X = 3.83bags

3.83 bags of cement will be require to plaster 50m² Area.

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**Also Check Out : **Calculating Total Bags of Cement and Tones of Sand Require in a Particular Volume of Concrete

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Calculating Total Bags of Cement Require for a Unit Area of Plastering