Brick calculator: how many bricks do I need?
549 bricks
80 square feet of surface · for 10 × 8 ft
Run your own numbers
Enter it the way you measured it: 4.5, 4 1/2,
3/8 or 10' 6".
549 bricks
80 square feet of surface
An 80 square foot wall takes 549 bricks of 7 5/8 by 2 1/4 inches laid with a 3/8 inch mortar joint, because each brick plus its joint covers 0.15 square feet. Change the joint to the one you lay.
A worked example
A 17 by 7 ft 6 in wall in 11 5/8 × 3 5/8 in brick, 3/8 inch joint, with a 5% waste allowance needs 402 bricks. 127.5 square feet at 0.33 square feet per brick and joint is 382.5, and the 5% allowance takes it to 402.
What else it is called
Brick sizes go by trade names that vary by region and by maker, and the same name can hide a different face. That is why this page asks for the measurement and not the name: measure one brick and type what you read.
Common sizes
| Area | 7 5/8 × 2 1/4 in | 7 5/8 × 2 3/4 in | 7 5/8 × 3 5/8 in | 7 1/2 × 2 1/4 in | 11 5/8 × 2 1/4 in | 11 5/8 × 3 5/8 in |
|---|---|---|---|---|---|---|
| 8 × 8 ft — 64 sq ft | 439 | 369 | 288 | 446 | 293 | 192 |
| 10 × 10 ft — 100 sq ft | 686 | 576 | 450 | 697 | 458 | 300 |
| 10 × 12 ft — 120 sq ft | 823 | 692 | 540 | 836 | 549 | 360 |
| 12 × 12 ft — 144 sq ft | 988 | 830 | 648 | 1004 | 659 | 432 |
| 12 × 16 ft — 192 sq ft | 1317 | 1106 | 864 | 1338 | 878 | 576 |
| 16 × 20 ft — 320 sq ft | 2195 | 1844 | 1440 | 2230 | 1463 | 960 |
| 20 × 20 ft — 400 sq ft | 2743 | 2304 | 1800 | 2787 | 1829 | 1200 |
Pieces, rounded up, with a 0.375 in joint and no waste allowance added.
Where the numbers come from
- The count is geometry on the two figures you enter: the brick face you measure and the mortar joint you lay. Each brick takes up its own face plus one joint in each direction, so a 7 5/8 by 2 1/4 inch brick with a 3/8 inch joint occupies 8 by 2 5/8 inches. No figure here is ours to source, and this page does not tell you how thick your joint should be.
This counts a single-wythe face: one brick thick, laid in a running bond. It does not subtract openings, it does not add the extra bricks a double wythe or a pier needs, and it says nothing about mortar quantity, which depends on the joint and is not on this page.
By Javier Miralles · Last updated . How this site is made.
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