Hollow masonry blocks.
List wall runs, openings and the already specified block module.
Read the right quantitative data
Unit face dimensions, supplied joints and separate special-unit counts.
Check this ordering assumption
A hollow block is not a solid displaced volume for estimating mortar or fill.
Keep block count, mortar yield and any separately specified fill volumes distinct.
A worked quantity method
This illustrative set of supplied inputs demonstrates Masonry Block Quantity Calculator. Replace the example measurements and product figures with your own before ordering.
| Supplied input | Metric display | US display |
|---|---|---|
| Installed block module length | 400 mm | 15.75 in |
| Installed course module height | 200 mm | 7.87 in |
| Corner units included in your layout | 2 | 2 |
| Duplicated intersection units to deduct | 0 | 0 |
| Waste allowance | 10 % | 10 % |
| Wall face 1: Wall length | 4 m | 13.12 ft |
| Wall face 1: Wall height | 2 m | 6.56 ft |
| Wall face 1: Opening area | 0 m² | 0 ft² |
Standard blocks to purchase: 108 blocks
- Corner units to purchase separately
- 3
- Total installed units
- 100
Standard and corner units are different purchase items. Do not price or order them as one interchangeable product.
Open this example in the full calculatorYour measurement and product-data sheet
Record what you know and mark verified items ready. Notes save on this browser after you edit them. Download a copy before clearing browser data.
List wall runs, openings and the already specified block module.
Unit face dimensions, supplied joints and separate special-unit counts.
A hollow block is not a solid displaced volume for estimating mortar or fill.
Input for Masonry Block Quantity Calculator. Record the value with its unit and quantity basis.
Input for Masonry Block Quantity Calculator. Record the value with its unit and quantity basis.
Input for Masonry Block Quantity Calculator. Record the value with its unit and quantity basis.
Input for Masonry Block Quantity Calculator. Record the value with its unit and quantity basis.
Input for Masonry Block Quantity Calculator. Record the value with its unit and quantity basis.
Input for Masonry Block Quantity Calculator. Record the value with its unit and quantity basis.
Input for Masonry Block Quantity Calculator. Record the value with its unit and quantity basis.
Input for Masonry Block Quantity Calculator. Record the value with its unit and quantity basis.
Choose your next calculation
Masonry Block Quantity Calculator
Separate standard units and specified corner units in a block wall purchase count.
Masonry Course and Closure Calculator
Count full units and geometric closure widths course by course from a supplied bond offset.
Masonry Special Unit Schedule Calculator
Separate supplied special-unit positions from ordinary face units and round different purchase packs independently.
Turn the estimate into an order
- Confirm that all quantities use the same measured basis and the selected product's current data.
- Keep different products, finishes and handed variants in separate purchase lines.
- Review exact demand and whole-pack purchase quantities before entering your quoted prices.
- Record compatible stock already on hand, then save the remaining order in your browser project.
Measurement and purchase guides
Other materials in this family
Reviewed 6 October 2026. Geometry and purchase arithmetic use your measurements and selected specifications. Calculation scope.