Brick & Block Calculator
Count the bricks or concrete blocks for a wall from its size, the unit size and the mortar joint.
Bricks or blocks needed
1,152
- Per square foot
- 6.85714
- Net wall area
- 160 ft²
Single wythe, running bond. Material counts are estimates — check with your supplier and local code before you buy.
Show the work
Net wall area: length × height − openings
net = length × height − openings
20 × 8 − 0 = 160 ft²
How many fit in a square foot (144 in²)
per ft² = 144 ÷ ((unit length + joint) × (unit height + joint))
144 ÷ ((7.625 + 0.375) × (2.25 + 0.375)) = 6.85714
Bricks or blocks, plus waste, rounded up
count = ⌈area × per ft² × (1 + waste ÷ 100)⌉
⌈160 × 6.85714 × (1 + 5 ÷ 100)⌉ = 1,152
How it works
Units per ft² = 144 ÷ ((unit length + joint) × (unit height + joint)); units = (wall area − openings) × units per ft² × (1 + waste)
Questions
- How does the brick & block calculator work?
- Units per ft² = 144 ÷ ((unit length + joint) × (unit height + joint)); units = (wall area − openings) × units per ft² × (1 + waste).
- What do I need to enter?
- Wall length, Wall height, Openings area, Brick or block, Unit length (actual), Unit height (actual), Mortar joint, Extra for waste. Optional fields can be left blank.
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