The calculation
Bricks = net wall area ÷ installed face of one brick
Bricks before waste = (wall length × wall height − openings) ÷ ((brick face length + joint) × (brick face height + joint))
- For a single wall face, use the dimensions of the exposed brick face and include the joint thickness in both directions.
- Nominal modular brick sizes can differ from real brick dimensions; the default actual US face is 7⅝ by 2¼ inches.
- Round up the net estimate after adding cut/breakage allowance; when buying full packs, round those separately.
- Mortar depends on actual product yield and construction; enter your bag coverage rather than relying on a universal default.
- Multiple wythes, patterns requiring unusual cuts, structural reinforcement, footings and corners need a more detailed design/takeoff.