Free Brick Calculator
Calculate how many bricks you need for a wall or project. Accounts for mortar joints and waste factor.
Standard mortar joint is 3/8 inch
Bricks (with waste)
1,122
Bricks (with waste) vs Wall Length
How to Calculate Bricks Needed
Formula
Bricks = Wall Area / Brick Face Area × (1 + Waste%)
Brick face area includes the mortar joint on one side and the top:
Brick Face Area = (Brick Length + Mortar) × (Brick Height + Mortar)
A standard modular brick is 8" × 2-1/4" with a 3/8" mortar joint. This gives approximately 6.75 bricks per square foot of wall.
Example Calculation
A wall 20 ft long and 8 ft high with standard modular bricks (8" × 2.25") and 3/8" mortar joints, 7% waste.
- 01Wall area = 20 × 8 = 160 sq ft
- 02Brick face area = (8 + 0.375)/12 × (2.25 + 0.375)/12 = 0.698 × 0.219 = 0.1528 sq ft
- 03Bricks needed = 160 / 0.1528 = 1,047 bricks
- 04With 7% waste = 1,047 × 1.07 = 1,121 bricks
Frequently Asked Questions
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