The brick calculator estimates total bricks, bricks per row, masonry rows, wall area, mortar volume, and waste allowance for a rectangular brick wall, so you can plan the purchase before you start.
Inputs and method
Enter gross wall dimensions, one rectangular opening in the selected wall unit, all three brick dimensions, mortar-joint thickness, and waste. The calculator subtracts the opening, divides net face area by the entered brick-and-joint module, then applies waste before the whole-brick purchase ceiling. Row counts use the gross wall geometry. Approximate mortar volume is net wall volume at the entered brick depth minus the unrounded brick volume.
Calculations retain full floating-point precision until the labeled display step. Counts and packages use an explicit upward ceiling only where a whole purchase unit is required.
Interpreting the estimate
Use the result as a planning value and keep input precision consistent with the measurements or source data you have. Small displayed differences can come from final-place rounding; intermediate values are not rounded.
Assumptions and limits
Openings beyond the single entered rectangle, bond pattern, cuts, breakage, mortar depth, and field yield require a project takeoff. Product dimensions and field conditions vary. For the concrete footing the wall sits on, use the concrete calculator; for metric mix quantities, see the concrete volume calculator; and to measure the wall area first, use the square footage calculator.
Empty or invalid inputs, prohibited negatives, zero denominators, impossible relationships, and unsupported options do not produce a potentially misleading numeric result.
Measure openings on the same basis as the wall
Record wall dimensions, opening dimensions, brick dimensions, and mortar-joint allowance before estimating a count. Keep the selected unit system consistent across the active fields. To compare waste allowances, change only wastage; otherwise a revised opening measurement can be mistaken for a benefit from reducing the purchase allowance.
Build an opening-and-unit checklist
| Measurement | Keep with the estimate | Common ambiguity to resolve |
|---|---|---|
| Wall | Length, height, and unit system | Interior or exterior scope being counted |
| Opening | Width and height in the active units | Whether the opening has already been removed from the wall measurement |
| Brick and joint | Brick dimensions and mortar thickness | A bare brick dimension versus the joint-inclusive spacing |
| Purchase allowance | Wastage percentage | Additional allowance rather than a larger measured wall |
Retaining these separately avoids subtracting an opening twice or confusing a packing allowance with the wall’s physical area.
Sources
- Technical Notes — Brick Industry Association technical guidance on brick construction.
- 2021 International Residential Code — residential masonry requirements.