Brick calculator
Enter the wall size, take out the openings and pick the brick and the joint. The calculator tells you how many bricks per square foot and how many to buy with waste.
See your design as an AI render — free- Bricks per sq ft
- 6.86
- Net area
- 160 sq ft
- Bricks without waste
- 1,097
Counts the exposed face of bricks laid flat. Hollow bricks, blocks and other bonds change the math.
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How to calculate bricks
Divide the wall area by the space each brick takes up with its joint.
- 1
Work out the net area
Length × height, minus doors and windows. A 20 × 8 ft wall with no openings is 160 sq ft.
- 2
Add the joint to the brick
A modular brick (7⅝ × 2¼ in) with a 3/8 in joint takes up 8 × 2⅝ in, or 21 sq in: 144 ÷ 21 = 6.86 bricks per sq ft.
- 3
Multiply by the area
160 × 6.86 = 1,097 bricks. For a double-wythe wall, multiply by 2.
- 4
Add waste
With 5% for breakage and cuts: 1,097 × 1.05 = 1,152 bricks.
Bricks per area
For the calculator's sizes, with the standard joint and 5% waste in the last column.
| Brick | Per sq ft (3/8 in joint) | For 100 sq ft with 5% waste |
|---|---|---|
| Modular (7.625 × 2.25 in) | 6.86 | 720 |
| Standard (8 × 2.25 in) | 6.55 | 688 |
| Queen (7.625 × 2.75 in) | 5.76 | 605 |
| King (9.625 × 2.625 in) | 4.8 | 504 |
Frequently asked questions
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