1 Bag of Cement Covers How Much Area of Plaster?

1 Bag of cement covers approx 101 square feet area of plaster when the plaster layer is 12 mm thick and mortar mix ratio is 1:4 (cement:sand).

Calculation For 1 Bag of Cement Covers How Much Area of Plaster (Ratio 1:4)

To calculate area of plaster covered by one bag of cement, we have some assumption as the plastering layer is 12 mm thick and mortar ratio is 1:4 where one part is cement and 4 part is sand.

Assumptions and Requirements

• Quality of cement = 50 kg (1 Bag)
• Plastering thickness = 12 mm
• Mortar ratio = 1:4 (cement: sand)
• Shrinkage factor and waste factor = 1.54
• Density of cement = 1440 kg/m³

Dry Volume of Mortar Mix

Since, Quantity of Cement
= Dry Volume of Mortar × Density of Cement × (Proportion of Cement / Total Sum of Proportion)

So, Dry volume of Mortar Mix

= Quantity of Cement / {Density of Cement × (Proportion of Cement / Total Sum of Proportion)}

= 50 kg / {1440 kg/m³ × (1/5)}

= 0.1736 m³

Wet Volume of Mortar Mix

Wet volume of mortar mix

= Dry volume / Shrinkage and west factor

= 0.1736 / 1.54

= 0.1127 m³

Area of Plaster Calculation

Since, Volume of Plastering Area 

= Area of Plastering × Thickness of Mortar Layer

Hence, Area of Plastering 

= Volume of Plastering Area / Thickness of Mortar Layer

= 0.1127 m³ / 0.012 m 

= 9.39 m²

= 101 Square Feet

Check: Sand Required For 100 Square Feet Plastering Work.

Calculation For 1 Bag of Cement Covering Area in Plastering (Ratio 1:5)

To calculate area of plaster covered by one bag of cement, we have some assumption as the plastering layer is 12 mm thick and mortar ratio is 1:5 where one part is cement and 4 part is sand.

Assumptions and Requirements

• Quality of cement = 50 kg (1 Bag)
• Plastering thickness = 12 mm
• Mortar ratio = 1:5 (cement: sand)
• Shrinkage factor and waste factor = 1.54
• Density of cement = 1440 kg/m³

Dry Volume of Mortar Mix

Since, Quantity of Cement
= Dry Volume of Mortar × Density of Cement × (Proportion of Cement / Total Sum of Proportion)

So, Dry volume of Mortar Mix

= Quantity of Cement / {Density of Cement × (Proportion of Cement / Total Sum of Proportion)}

= 50 kg / {1440 kg/m³ × (1/6)}

= 0.2083 m³

Wet Volume of Mortar Mix

Wet volume of mortar mix

= Dry volume / Shrinkage and west factor

= 0.2083 / 1.54

= 0.1353 m³

Area of Plaster Calculation

Since, Volume of Plastering Area 

= Area of Plastering × Thickness of Mortar Layer

Hence, Area of Plastering 

= Volume of Plastering Area / Thickness of Mortar Layer

= 0.1353 m³ / 0.012 m 

= 11.275 m²

= 121.4 Square Feet

1 Bag of cement covers approx 121.4 square feet area of plaster when the plaster layer is 12 mm thick and mortar mix ratio is 1:5 (cement:sand).