Brick Calculator

A brick wall is a repeating grid, and the number of bricks it takes depends on the size of the unit plus the mortar joint between it and its neighbours. The joint counts because it adds to the effective footprint of every brick: a standard modular brick is about eight inches long and two and a quarter high, but with a three-eighths joint it occupies a cell of roughly eight inches by two and five-eighths, and that larger cell is what divides into the wall area. The practical rule that follows is that a square foot of single-skin brickwork holds around seven bricks for standard units, with wider or narrower joints shifting that figure slightly. Small bricks and large joints push the count up; oversize units push it down. Changing the joint width by an eighth of an inch can move the total by a few per cent, which matters on a large wall but is noise on a garden border. Waste and layout come next. Corners, openings and the top course all consume cut bricks, and cut bricks still have to be bought. Five per cent is a reasonable allowance for a straightforward rectangular wall with a few openings; add more for curves, decorative bonds or lots of piers. Because bricks are normally ordered in packs of a few hundred, the final quantity is usually rounded to a convenient pack size. This calculator computes bricks per square foot from your brick dimensions and joint, applies a waste allowance and rounds to a sensible order quantity. It assumes a single skin of wall; a double-skin cavity wall needs roughly twice as many facing bricks, plus blocks or an inner leaf. Confirm the bond and the unit size with your supplier, since brick dimensions vary by region.

This calculator returns estimates for planning and general information only. It is not engineering, architectural, structural, electrical or code advice, and it cannot replace a qualified professional who has seen the site. Material quantities depend on the actual dimensions, the product you buy and local building codes, so confirm the figures before ordering materials or starting work, and always follow local regulations.