calcs.homes
calcs.homes
Enter how many blocks or bricks you're laying to find the number of mortar mix bags to buy.
Estimate only — joint thickness and unit size shift actual coverage per bag.
For concrete block, we multiply your block count by 3 and divide by 100, rounding up; for brick, we multiply your count by 7 and divide by 1,000, rounding up — both are standard trade rules of thumb. Cost multiplies the resulting bag count by your price per bag.
These per-100 and per-1,000 ratios assume typical 3/8 in mortar joints, the thickness most masonry work is laid to, and rounding up to a whole bag matters since mortar mix isn't sold in fractional amounts. Larger units like concrete blocks need less mortar per square foot of wall than smaller bricks, because a wall built from bigger pieces has less total joint length to fill for the same coverage area.
About 3 bags of standard mortar mix per 100 concrete blocks, assuming typical 3/8 in mortar joints.
Yes — larger units (like standard blocks) need less mortar per square foot of wall than smaller units (like bricks) because there's less total joint length for the same wall area.