5 to the total for waste sand amount needed for block count.
How to estimate concrete block walls.
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.
Measure the length width and height of the void in inches then multiply to get the cubic inches of the void.
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.
Input length and width of the area.
The calculator can estimate the total price of the concrete blocks if you know the price per block using the formula.
Use the block calculators below to calculate the amount of materials needed.
To calculate the total number of concrete blocks needed.
Click the button to calculate the volume of concrete and man hours not including mixing needed for this job.
Multiply the cubic inches by the number of voids in the wall typically 2 per block.
Finally divide cubic inches by 46 656 to find cubic yards of concrete needed.
Calculate the number of blocks and the amount of mortar needed for the wall.
Allowing for a standard 3 8 inch mortar joint it takes 225 4 inch tall by 16 inch long blocks and 13 5 cubic feet of.
This calculator is to be used as an estimating tool only.