Brick and Concrete Block Calculator
Estimate masonry units and editable material cost for multiple walls after openings, joint dimensions, quantities, and waste.
How to use the brick & block calculator
- Measure the actual project. Break irregular work into separate sections and record finished dimensions consistently.
- Enter the core measurements. The quick view focuses on project geometry; add or subtract sections where the calculator supports multiple areas.
- Review purchasing assumptions. Open Advanced inputs to replace example prices, waste, coverage, density, pack size, minimum order, or delivery assumptions with current project information.
- Calculate and verify. Review the formula, limitations, whole-unit rounding, product instructions, and supplier requirements before purchasing.
Key inputs covered: Masonry unit, Unit face length, Unit face height, Mortar-joint width, Cut and breakage allowance, Unit example price, Wall length, Wall height, Door/window openings, Identical walls.
Result coverage: The brick & block calculator reports 6 separate quantities so the primary estimate and its supporting purchase or planning values can be checked together.
How the estimate works
For each wall, openings are subtracted from length × height; net area is divided by the unit-plus-joint face module and increased for cuts and breakage.
Standard nominal dimensions can differ from actual manufactured dimensions, so all unit and joint fields remain editable.
Assumptions, rounding, and limitations
Dimensions are treated as finished measurements. Only deductions and allowances entered above are included. Decimal measurements display to two places; purchase quantities round up when a whole container or piece is required.
- Use actual unit face dimensions and the specified joint, bond pattern, and manufacturer guidance.
- Corners, bond beams, lintels, reinforcement, grout, flashing, and special units are outside this count.
- Structural masonry must be designed and detailed from approved plans.
Sources and review
These references support unit conversions and selected planning assumptions. Product instructions and local requirements control the actual project.
Last reviewed: 2026-10-09
Editorial process
BuildPlanCalc publishes the formula, editable assumptions, limitations, and supporting references so the estimate can be checked rather than treated as a black box. See the calculation and review methodology, or report a correction.
Frequently asked questions
Are the results exact?
No. Results are planning estimates based on the dimensions and assumptions entered. Confirm product coverage, site conditions, and ordering rules with the supplier.