DIY & materials
Brick and block count Calculator
Estimate masonry units from wall area, openings and joint modules. This free brick and block count calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Estimate masonry units from wall area, openings and joint modules.
Calculated outcomes
- Net Wall Area M2
- 21 m²
- Units Per M2
- 9.877 units/m²
Assumptions and estimates
- Method: Unit module area = (length + joint) × (height + joint). Count = net wall area ÷ module area, with waste and rounding up.
- Area estimate assumes standard horizontal courses. Corners, bonds, piers, lintels, cuts and reinforcement need a take-off.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the brick and block count calculation works
Unit module area = (length + joint) × (height + joint). Count = net wall area ÷ module area, with waste and rounding up.
Area estimate assumes standard horizontal courses. Corners, bonds, piers, lintels, cuts and reinforcement need a take-off.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review units and material cost, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Wall length (m)
- 10
- Wall height (m)
- 2.4
- Opening area (m²)
- 3
- Unit length (mm)
- 440
- Unit height (mm)
- 215
- Mortar joint (mm)
- 10
- Waste allowance (%)
- 5
- Price per unit (€)
- 2
- Units
- 218
- Material Cost
- €436.00