How to compute quantity of block from block masonry and how to compute mortar [cement and sands]?

There is a block wall with length equal to 6 m and height equal to 3 m.

One block [with no mortar] has length equal to 405 mm, height equal to 200 mm and breadth equal to 152 mm.

Wall Volume is equal to L x B x H = 6 m x 0.152 m x 3 m = 2.736 m³

One block volume [with no mortar] = L X B X H = 0.405 m x 0.152 m x 0.200 m = 0.012312 m³

One block volume [with mortar added to length and height] is equal to 0.430 m x 0.152 m x 0.225 m = 0.014706 m³

Number of blocks is equal to Wall Volume/One Block Volume with Mortar = 2.736/0.014706 = 186 number of blocks

Overall blocks volume is equal to number of blocks x 1 block volume without mortar = 186 x 0.012312 = 2.290032 m³

Mortar volume is equal to Total volume – Blocks volume

Wet volume is equal to 2.736 – 2.290032 = 0.445968 m³

Dry volume is equal to 1.27 x wet volume = 1.27 x 0.445968 = 0.56637936 m³

Cement mortar ratio is equal to 1:6 [1 is cement and 6 is sand, standard ratio]

Cement is equal to Cement ratio/ratio sum x volume = 1 x 0.56637936/7 = 0.08091134 m³

[In bags] is equal to 0.08091134/0.035 = 2.31 bags

Sand is equal to 6 x 0.56637936/7 = 0.48546802 m³

To get more information on how to calculate quantity of concrete blocks, go through the following video tutorial.