# Percentage of Bricks and Mortar in a Masonry Wall

By Jahanzaib

16-3-2015

**Case 1: ****When thickness of the wall is 4.5” and that of mortar is 12mm, having the following plan.**

In this case

Height of the wall along with the mortar = (10 x 3) + [(9 x 12)/25.4] = 34.252″

In the above equation

10 = No of Brick Layers

9 = No of layers of Mortar of 12mm each

3 = Brick Height in inches

Width= 4.5”

Length of the wall along with the mortar= (5.5 x 9) + [(5×12)/25.4]
Volume of the wall along with the mortar= **L×W×H
**Volume of the wall along with the mortar= 7993.72 cubic inch

**Volume of the wall along with the mortar= 4.626 cft**

Now Number of Bricks= 55

Volume of One Brick= (9/128) cft

Total volume of bricks used= 55 x (9/128) = 3.867 cft

**%age of bricks used = (3.867 / 4.626)*100 = 83.6 = 84%**

**%age of mortar used= 16.4%**

**Case 2:****When thickness of the wall is 9” and that of mortar is 12mm, having the following plan.**

In this case

Height of the wall along with the mortar = (10 x 3 ) + [( 9 x 12 )/25.4] = 34.252″

Width of the wall along with the mortar = (9+12/25.4)” = 9.472″

Length of the wall along with the mortar= (5.5 x 9) + (5 x 12/25.4) = 51.862″

Volume of the wall along with the mortar= **L×W×H
**Volume of the wall along with the mortar=16826.678 cubic inch

**Volume of the wall along with the mortar= 9.7376 cft**

Now Number of Bricks= 110

Volume of One Brick= 9/128 cft

Total volume of bricks used= 110 x (9/128) = 7.7344 cft

So

**%age of bricks used = (7.7344 / 9.7376) x 100 = 79.43% = 80%**

**%age of mortar used= 20.57%**

**= 21%**

**Case 3: ****When thickness of the wall is 4.5” and that of mortar is 10mm, having the following plan.**

In this case

Height of the wall along with the mortar = (10 x 3) + (9 x 10/25.4) = 33.543″

width = 4.5″

Length of the wall along with the mortar= (5.5 x 9) + (5 x 10/25.4) = 51.468″

Volume of the wall along with the mortar= **L×W×H
**

**Volume of the wall along with the mortar= 4.4959 cft**

Now Number of Bricks= 55

Volume of One Brick= 9/128 cft

Total volume of bricks used= 55 x 9/128 = 3.8672 cft

**%age of bricks used = (3.8672 / 4.4959) x 100 = 86%**

%age of mortar used = 14%

%age of mortar used = 14%

**Case 4:****When thickness of the wall is 9” and that of mortar is 10mm, having the following plan.**

In this case

Height of the wall along with the mortar = (10 x 3) + (9 x 10/25.4) = 33.543″

width = (9 + 10/25.4)” 9.3937″

Length of the wall along with the mortar= (5.5 x 9) + (5 x 10/25.4) = 51.468″

Volume of the wall along with the mortar= **L×W×H
**

**Volume of the wall along with the mortar= 9.38513 cft**

Now Number of Bricks= 110

Volume of One Brick= 9/128 cft

Total volume of bricks used= 110 x 9/128 = 7.7344 cft

**%age of bricks used = (7.7344 / 9.38513) x 100 = 82.4% = 82%**

%age of mortar used = 17.6% = 18%

%age of mortar used = 17.6% = 18%

**Conclusion**

Where in it

W= wall thickness in inches

m= thickness of the mortar in mm

The answer will be the %age of mortar, and for better results round it off.

Its **Verification** is given below after the example from observation.

**EXAMPLE:
**If thickness of the wall is 4.5” and that of mortar is 12mm, then what will the percentage of mortar used in the wall?

**Solution:**

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is this formula also useful to calculate the percentages of mix design mortar..e.g when in cement sand there is also present a third quantity to increase the strength of the mortar..

That is Crush the Third quantity. You will have to do Proper Rate Analysis to find them

i learn so much as your website thank you

Thanks a lot for this article.

welcome

I usually see and even read in quantity book even though not satisfied that in 100cft brickwork it required 1350 number of bricks and 30cft dry mortar is it correct plz guide

Ask such questions here https://www.facebook.com/groups/jobsforcivilengineers/?ref=bookmarks

the bricks calculate in wall which formula to use plz tell me.

Its written.

please explain this portion of case 1..

Now Number of Bricks= 55

Volume of One Brick= (9/128) cft

Total volume of bricks used= 55 x (9/128) = 3.867 cft

Volume of One brick = 9/128

Brief

Volume of One Brick = 9″ x 4.5″ x 3″ (L X B X H)

Thanks for sharing such a great knowledge with us, your post is great and your information give best result.

welcome