Brick and Mortar Calculator
Find how many bricks a wall needs for nine standard brick sizes or your own, less openings, with the mortar.
Change the values and press Calculate to work out your own figures.
Enter the wall's length and height and choose the brick.
Show the working
- bricks = (wall area − openings) ÷ ((length + joint) × (height + joint)), rounded up
How to use it
Enter the wall's length and height and choose the brick.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
bricks = (wall area − openings) ÷ ((length + joint) × (height + joint)), rounded up
Mortar
An 80 lb bag of premixed mortar lays about 30–36 standard bricks. Add 5–10% for breakage and cuts.
Brick sizes
| Brick | Size (in) | Per sq ft | Per m² |
|---|---|---|---|
| Modular | 7 5/8 × 2 1/4 × 3 5/8 | 6.86 | 73.8 |
| Queen | 7 5/8 × 2 3/4 × 3 1/8 | 5.76 | 62 |
| Closure | 7 5/8 × 3 5/8 × 3 5/8 | 4.5 | 48.4 |
| Standard | 8 × 2 1/4 × 3 5/8 | 6.55 | 70.5 |
| Jumbo | 8 × 2 3/4 × 3 5/8 | 5.5 | 59.2 |
| King | 9 5/8 × 2 5/8 × 2 3/4 | 4.8 | 51.7 |
| Roman | 11 5/8 × 1 5/8 × 3 5/8 | 6 | 64.6 |
| Norman | 11 5/8 × 2 1/4 × 3 5/8 | 4.57 | 49.2 |
| Utility | 11 5/8 × 3 5/8 × 3 5/8 | 3 | 32.3 |
Questions
How many modular bricks for a 10 × 8 ft wall?
549 (about 6.9 per sq ft).
Formulas
bricks = (wall area − openings) ÷ ((length + joint) × (height + joint)), rounded up
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.