Brick calculator
How many bricks do I need?
Estimate the number of bricks for a wall based on wall dimensions, brick size, and mortar joint thickness.
Brick calculator
Brick calculator result
Standard brick sizes
- Modular brick: 7-5/8 x 2-1/4 x 3-5/8 inches (most common)
- Queen brick: 7-5/8 x 2-3/4 x 2-3/4 inches
- King brick: 9-5/8 x 2-5/8 x 2-3/4 inches
- Engineer brick: 7-5/8 x 2-13/16 x 3-5/8 inches
Modular brick is the default assumption for most estimates. Adjust the brick dimensions in the calculator if using a different size.
Brick patterns and bonds
The brick pattern affects both appearance and material count. Common bonds include running bond (offset by half), common bond (running bond with header courses), and Flemish bond (alternating stretchers and headers). The calculator assumes a standard running bond, which has the most efficient material usage.
Worked example
For example, for a 15×6 ft brick wall, standard modular bricks (7.625 × 2.25 in at face), ⅜-in mortar joint:
- Wall area = 15 × 6 = 90 sq ft
- Brick face area including joint = (7.625 + 0.375) × (2.25 + 0.375) ÷ 144 = 8 × 2.625 ÷ 144 = 0.146 sq ft
- Bricks needed = 90 ÷ 0.146 = 616 bricks
- Add 5% for cuts and breakage: 616 × 1.05 = 647 bricks
- Also calculate mortar with the mortar calculator
Common mistakes
| Mistake | Why it matters |
|---|---|
| Not including mortar joint in brick count | The ⅜-in joint adds up — skipping it can short your order by 10-15% |
| Assuming all bricks are perfectly uniform | Some bricks have slight size variations — order extra for selection |
| Forgetting to account for corners and half-bricks | Window sills, corners, and openings need cut bricks — add 5% waste |