# How To Calculate Cement And Sand For Plastering? Calculation of quantity of material for 12 mm thick plaster of ratio 1: 6 (1 Cement:6 Sand) in the wall for 100 Sqm

1. Quantity of Cement = 2/(1+6) × 1 (1 Ratio of cement)
2. In Kg = 0.30 × 1440 (Density of cement = 1440 kg/m3)
3. Quantity of Sand = 2/(1+6) × 6 (6 Ratio of sand)
4. In Cubic Feet = 63.558 cft (1 Cum = 35.31 cft)

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## How to calculate cement and sand for 100 m2 plastering area?

How To Calculate Cement, Sand Quantity For Plastering? – Following points should be remembered while calculating the quantity of cement, sand for plastering work.1. For wall plastering, Cement : Sand = 1 : 6 2. For ceiling plastering, Cement : Sand = 1 : 4 3.

Thickness of plaster should be in between 12-15 mm. If an additional coat is required then do not do it at one go.4. Use good quality of cement & Sand.5. Use measuring box (not head pan) for site mix. We will calculate cement and sand for 100 m 2 plastering area in 1:6 ratio and thickness of 12 mm. Cement Mortar Required: Plastering thickness = 12 mm = 12/1000 = 0.012m Volume of cement mortar required = ( Plastering Area x thickness ) = 100 m 2 x 0.012m = 1.2 m 3 (This is wet volume of cement mortar (after mixing water) but we need dry volume.

To get dry volume consider 35% bulking of sand and 20% wastages = 1.2 m 3 x (1+0.2+0.35) (Rather than 35% sand bulkage and 20% wastage you can add 1.54 as constant) = 1.86 m 3 Cement : Sand = 1 : 6 Sum of ratio =( 1 + 6) = 7 ∴ Cement required = 1.86 x 1/7 = 0.265 m 3 = 0.265/ 0.0347 ( 0.0347 m3 = 1 bag = 50 kg cement) = 7.66 bags ( ≈ 8 Bags) ∴ Sand required = 1.86 x 6/7 = 1.59 m 3 Here we have calculated in Sq.m but you can also calculate it in Sq.ft.

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#### How to calculate plastering work?

Calculating the quantities of Cement & Sand required for plastering Work: – How to Calculate Quantity of Cement Sand and Water in Plastering General points to be remembered in Plastering work calculation Plastering Estimate

• The ratios mentioned in plastering are volumetric ratios of Cement & Sand (Ex. Cement:Sand = 1:5, 1 part of cement and 5 parts of sand in a mortar).
• The overall thickness of plastering should be minimum 20mm including two coats.
• Cement has a dry density volume of 1440Kg/m 3
• Each bag of cement weighs = 50 Kgs or 110 lbs
• The Volume of each cement bag = 50Kgs/1440 = 0.0348 m 3,
• The dry density of sand = 1600Kgs/m 3
• The plastering is done in two layers (two coats): The first coat of plastering is laid with the thickness of minimum 12mm (usually ranges between 12-15mm) and this coat is called as a Rough coat or Primary coat,
• The second coat should be laid with the thickness of 8mm and this is called as a Finish coat or Secondary coat of plastering. Plastering Estimate

Total Plastering = First coat + Second Coat How to Find Plastering Quantity

#### How much cement do I need to make a 12mm plaster?

Plastering Work Ratio Calculation – For a better understanding, we are going to do this calculation for 100 Sq.m area.

• To calculate the cement and sand for 100 m 2 plastering area in 1:6 ratio and 12 mm thickness.
• Cement Mortar Required :
• Plastering thickness 12 mm = 12/1000 = 0.012m
• Volume of cement mortar required = ( Plastering Area x thickness )

= 100 m 2 x 0.012m = 1.2 m 3 (This is wet volume that means we need this much volume of cement mortar after mixing water, So for dry volume, we have to add 30-35% as bulkage of sand, we are using 35% and wastage as 20%) Consider 35% Sand Bulkage = 1.2 m 3 x (1+0.2+0.35) (Many of us would use 1.54 as constant)

1. = 1.86 m 3
2. Cement : Sand (Ratio) = 1 : 6 ( Total = 1+6 = 7 Parts )
3. Cement required (1 Part) = 1.86 x 1/7
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= 0.265 m 3 /0.0347

• = 7.66 bags (Approx – 8 Bags)
• Sand required (5 Part) = 1.86 x 6/7
• = 1.59 m 3

We normally use Sq.m while calculating plastering cement mortar. If you want to calculate it in Sq.ft Just convert that sq.ft into Sqm using and then use this formula.

### How do you calculate the volume of sand in cement mortar?

Plastering Work Ratio Calculation – For a better understanding, we are going to do this calculation for 100 Sq.m area.

• To calculate the cement and sand for 100 m 2 plastering area in 1:6 ratio and 12 mm thickness.
• Cement Mortar Required :
• Plastering thickness 12 mm = 12/1000 = 0.012m
• Volume of cement mortar required = ( Plastering Area x thickness )

= 100 m 2 x 0.012m = 1.2 m 3 (This is wet volume that means we need this much volume of cement mortar after mixing water, So for dry volume, we have to add 30-35% as bulkage of sand, we are using 35% and wastage as 20%) Consider 35% Sand Bulkage = 1.2 m 3 x (1+0.2+0.35) (Many of us would use 1.54 as constant)

1. = 1.86 m 3
2. Cement : Sand (Ratio) = 1 : 6 ( Total = 1+6 = 7 Parts )
3. Cement required (1 Part) = 1.86 x 1/7

= 0.265 m 3 /0.0347

• = 7.66 bags (Approx – 8 Bags)
• Sand required (5 Part) = 1.86 x 6/7
• = 1.59 m 3

We normally use Sq.m while calculating plastering cement mortar. If you want to calculate it in Sq.ft Just convert that sq.ft into Sqm using and then use this formula.