Block wall calculator
Estimate outputs: Area, Bricks or blocks. Adjust Length, Height, Openings area to match your project.
Estimate outputs: Area, Bricks or blocks. Adjust Length, Height, Openings area to match your project.
Inputs and units
Use the units shown beside each field. Replace the sample values with your measurements and the figures on the selected product packaging.
| Parameter | Example input |
|---|---|
| Length | 8 m |
| Height | 2.7 m |
| Openings area | 2 m² |
| Brick length | 60 cm |
| Brick height | 20 cm |
| Joint thickness | 3 mm |
| Waste allowance | 5 % |
Formula and assumptions
Bricks or blocksceil(max(0, Length × Height - Openings area) × (1 + Waste allowance / 100) / ((Brick length / 100 + Joint thickness / 1000) × (Brick height / 100 + Joint thickness / 1000)))
ceil = round up; floor = round down; max = the greater value. Trigonometric angles are converted from degrees to radians.
Allowance is applied before rounding to whole packages. Whole units are rounded up; displayed decimals are rounded only for readability.
Geometry and material quantities do not determine load capacity or reinforcement design. Use dimensions specified in the project.
Worked example
Sample values are examples, not product specifications. Run the calculation again with your own measurements.
| Result | Calculation |
|---|---|
| Area | 19.6 m² |
| Bricks or blocks | 169 |
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