Masonry Block Quantity calculator.
Separate standard units and specified corner units in a block wall purchase count.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Enter installed module dimensions, including any specified joints. Your plan supplies the corner-unit count and intersection deduction; these are not selected by the tool.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Installed block module length
- 400 mm
- Installed course module height
- 200 mm
- Corner units included in your layout
- 2
- Duplicated intersection units to deduct
- 0
- Waste allowance
- 10 %
- Wall length
- 4 m
- Wall height
- 2 m
- Opening area
- 0 m²
Standard blocks to purchase: 108 blocks
Standard and corner units are different purchase items. Do not price or order them as one interchangeable product.
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.