About this tool
Brick & Block Calculator is a free, in-browser tool that estimates how many bricks or concrete blocks you need to build a wall, plus the mortar bags to lay them. Enter the wall length and height, pick a masonry type, and everything is computed locally as you type — nothing is uploaded.
The wall area is length × height (in square feet). Each masonry type carries a bricks-per-square-foot figure that already accounts for a standard 3/8-inch mortar joint: 6.86 for modular brick, 6.55 for standard (queen-size handles 5.76), and 1.125 for an 8×8×16 concrete block. Choose Custom to derive it from your own units: bricks per ft² = 144 ÷ ((face length + joint) × (face height + joint)), with all dimensions in inches. The final count is area × bricks-per-ft² × (1 + waste ÷ 100), rounded up. Mortar is estimated at roughly one 80-lb bag per 125 bricks.
Use it to order materials for a wall, veneer or planter: the waste percentage (10% by default) covers cuts and breakage, so the headline number is a safe buy quantity rather than a bare minimum.