Concrete & masonry
Concrete Block Calculator
Your measurements : area, actual block / brick length, actual block / brick height. Your estimate : blocks / bricks, units per m².
How the calculation works
Concrete Block Calculator
round up(Area ÷ ((Actual block / brick length + Joint width) × (Actual block / brick height + Joint width)) × (1 + Waste allowance / 100))Before you order
- Use the coverage, yield and dimensions printed on your product. Waste allowance is adjustable; real cuts and site conditions may change the order.
- Planning estimate only. This is not a structural design, a safety approval or a local code check.
Worked example
- Area
- 20 m²
- Actual block / brick length
- 0.49 m
- Actual block / brick height
- 0.19 m
- Joint width
- 0.01 m
- Waste allowance
- 10 %
Blocks / bricks 220
Units per m² 10 1/m2