This question is mostly asked in interviews and commission exams. The right answer is 500 bricks are used in 1 m3. for this we know the standard size of a brick is 19″ x 9″ x 9″ And With mortar, it becomes 20″ x 10″ x 10′. So first we have to Find the Volume of Brick and then the volume of 1 m3 area. After we have the values of volume of brick and volume of 1 m3 space, then we use a formula to find out how many no of brick are used in 1 m3.

The Formula is

No of Bricks = Volume of 1 m3 / Volume of 1 brick So the answer is 500 no of bricks are needed in 1 m3.


Size of Modular Bricks:

Length = 19cm

Breadth = 9cm

Height = 9cm

Therefore, Volume = 19x9x9 = 0.001539 m3

Number of Bricks in 1Cum without mortar = 1/0.001539

= 649.772

= 650 nos.

Considering Mortar thickness =10mm

Size of Bricks with Mortar = 20cm x 10cm x 10cm

Volume of 1 Brick with Mortar =20x10x10 m3 ………(1)

Volume of 1Cum = 1x1x1m

= 100cm x 100cm x100cm ……….(2)

Dividing equation (2) by (1)

Number of Bricks = (100X100X100) / (20X10X10)

= 500 Nos.

Therefore, the number of Bricks in 1 CUM is 500 nos.

For more information watch this video


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  1. Dear sent me estimations of some structures for example cements sand and gravel and some other’s structure.

  2. Thanks for the useful information.
    If possible we need an explaination and examples of segmental and via duct bridges and thier theory, design and the calculation of the post-tension and its design as well.
    Thanks again.

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