# 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.

### 18 thoughts on “How To Calculate Cement, Sand Quantity For Plastering”

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

• potangina mo
wala akong naintindihan
ang bobo mo gumawa
nag aral ka ba

• excellent Solution Of Plastering Work
Thank You.

• Good job, may God bless you in abundant sir.
Sir, what if there is no measuring box, can we use 0.5 as the headpan volume to get the number of sand required ?

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

• Sir. My to be Plastered is 440m2
I’m stuck
440×0.015= 6.6
6.6x(1+0.2+0.35)
=9.9
1:6
9.9×1/7= 1.414
Pls help

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

• we find 1 cum mortar quantity thetas why we use 1
total calculation is (1+0.35+0.20)= 1.54 (constant)

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.