Brick and Mortar Calculator (Wall Bricks and Mortar Bags)
Enter wall size and brick size to get bricks and mortar.
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Brick and Mortar Calculator (Wall Bricks and Mortar Bags) by TheCalcTools
How the Brick and Mortar Calculator (Wall Bricks and Mortar Bags) works
Wall area is length × height minus openings.
Bricks per sq ft = 144 ÷ ((brick length + joint) × (brick height + joint)).
Mortar per brick is the volume of one bed joint plus one head joint across the brick’s thickness; waste is added.
The formula
Worked example
Using the default values shown in the calculator:
| Wall length (ft) | 20 |
|---|---|
| Wall height (ft) | 6 |
| Doors and windows (sq ft) | 0 |
| Brick length (in) | 7.625 |
| Brick height (in) | 2.25 |
| Brick thickness / wall depth (in) | 3.625 |
| Mortar joint (in) | 0.375 |
| Brick waste | 7 % |
| Mortar waste | 25 % |
| Mortar bag yield | 80 lb bag (0.60 cu ft) |
- 20 ft × 6 ft = 120.0 sq ft. Bricks per sq ft: 6.86.
- Buy 881 bricks with waste and 14 bags of mortar mix (8.0 cu ft).
Result:
| Wall area (sq ft) | 120.0 |
|---|---|
| Bricks per sq ft | 6.86 |
| Bricks to buy (with waste) | 881 |
| Mortar needed (cu ft) | 8.0 |
| Bags of mortar mix | 14 |
Frequently asked questions
How many bricks per square foot?
About 6.9 for a standard modular brick with a 3/8 inch joint, so about 690 bricks per 100 sq ft.
How much mortar for 1,000 bricks?
About 8 to 10 cubic feet with waste for a single wythe wall, which is roughly 13 to 17 bags of 80 lb mix.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.