Calculate the surface area of a single block in the wall including its mortar allowance.
How many concrete blocks to build a wall.
Foundation all concrete block walls must rest on a sturdy foundation of poured concrete.
Concrete blocks are concrete masonry units or cmus but we often refer to them as concrete blocks or cinder blocks learn more about concrete masonry units a wall typically requires 1 1 8 blocks per square foot.
The depth and size of the foundation will vary depending on the size of the concrete block wall and the weight it must support but a typical freestanding wall requires a foundation that is about twice as wide as the wall itself and which extends about 1 foot down below the frost line.
Multiply the total wall area by 1 125 to get the approximate number of blocks you ll need to build the garage walls.
For example if your cinder blocks are 8x8 in 20x20 cm and you want to use 2 blocks to make up the wall s width your total wall width would be 16 in 40 cm.
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.
Finding how many concrete blocks you need for your project can seem like a confusing and challenging task but it can be simplified using the calculator above.
Regardless of the block wall s purpose the basic steps for building it remain the same.
To determine the width of your future wall decide how many cinder blocks you want to use for the wall width then calculate the width using the block s measurements.
Add 5 percent to the total to account for spoiled blocks which in this example is 40 blocks.