If you re using a standard 16 x 8 x 8 block find the number of blocks needed by dividing the wall square footage by 89.
How to figure number of concrete blocks in a wall.
How to calculate concrete blocks needed.
Calculate the number of blocks required by substituting the area to be built and the size of the block in this equation.
To figure out how many rows you ll need divide the ideal wall height by the height of the block.
5 to the total for waste sand amount needed for block count.
Of wall area 75 of wall length give block per course number of courses 1 5 x height of wall.
Concrete block calculator estimator.
Please enter length in foot.
Usually standard rectangular size is used in the construction of buildings.
For example if your standard concrete block is 1 foot by 0 5 feet and is separated from its neighbours by a half inch of mortar then each block accounts for 1 0417 x 0 5417 or 0 5643 square feet.
Total area of walls area of a block number of blocks required.
Click the button to calculate the volume of concrete and man hours not including mixing needed for this job.
Blocks wall sq.
To conclude the example building 2 100 square feet of wall from 0 89 square foot blocks requires 2 360 blocks 2 100 x 0 89 2 359 55.
To estimate how many blocks you ll need per row divide the total length of the wall by the length of the block.
Sand per 100 block 1 125 block per sq ft.
Divide the total surface area of the wall by surface area of one block.
Number of blocks surface area of wall surface area of a block 91 1 0625 86.
So the total numbers of blocks required 86 86 x 5 100 86 4 90.
Consider 5 wastage of concrete blocks.
Use the block calculators below to calculate the amount of materials needed.
To freeform the layout use a rope or hose to outline the desired shape.
This calculator is to be used as an estimating tool only.
Input length and width of the area.
We recommend adding 5 10 additional blocks to account for broken blocks or blocks that need to be cut for the edges.
3 bags mortar per 100 block 35 block per bag 1000 ib.
Step 5 divide the total surface area of the wall by the surface area of the representative block to get the total number of blocks in the wall.
After use a shovel or spray paint to mark the outline.