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How To Calculate Cement, Sand Quantity For Plastering

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 m2 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 m2 x 0.012m = 1.2 m3

(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 mx (1+0.2+0.35) (Rather than 35% sand bulkage and 20% wastage you can add 1.54 as constant)

= 1.86 m3

Cement : Sand = 1 : 6

Sum of ratio =( 1 + 6) = 7

Cement required

= 1.86 x 1/7

= 0.265 m

= 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 m3

Here we have calculated in Sq.m but you can also calculate it in Sq.ft.

Also Read – How To Calculate No. Of Bricks In A Wall.
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Comments ( 17 )

  1. which type of cement is preferred for wall cementing and why?

  2. Good knowledge for plastering work

  3. Sir how to calculate quantity of the plaster area is 2.75*2.65 and pls translate in sqm

  4. How to calculate quantity of gypsum plaster ??

  5. = 1.2 m3 x (1+0.2+0.35) (Rather than 35% sand bulkage and 20% wastage you can add 1.54 as constant)

    .20 wastage
    .35 bulkage
    1 = ???? Can u explain me sir

  6. Nice preparation

  7. What is 1 in 1+0.35+0.20

  8. Sir notes hindi lanuage me Diya kro

  9. Sir how to quantity of cement and sand of plastering area 30’*30′

  10. hello,
    where did you get 1.86? explain me.

  11. This was great!!! I love it. You are doing a tremendous job. God bless you. I’ll like to learn how to Calculate the quantity of mortar for a wall built with blocks of dimensions 15x20x40 [cm]. Thanks in advance.

  12. Great lessons! It can help out many people in construction works.

  13. will 1.54 constant be remain same for both cubic meter and cubic feet ?

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