DIY CalculatorThe default adds 5% for cuts and breakage. For a double-thick wall, double the result.
Good to know
- Modular brick: about 7 per square foot.
- Queen brick: about 5.8 per square foot; king brick: about 4.8.
- Mortar: roughly 7 bags per 1,000 modular bricks.
- Leave out doors and windows by measuring the wall in sections.
Bricks needed by wall area (no extra added)
| Wall area | Modular 2 1/4 × 7 5/8 in | Queen 2 3/4 × 7 5/8 in | King 2 5/8 × 9 5/8 in | Utility 3 5/8 × 11 5/8 in |
|---|---|---|---|---|
| 20 sq ft | 138 | 116 | 96 | 60 |
| 50 sq ft | 343 | 288 | 240 | 150 |
| 100 sq ft | 686 | 576 | 480 | 300 |
| 200 sq ft | 1,372 | 1,152 | 960 | 600 |
How to use this calculator
- Measure the wall length and height (or the diameter of a round area). Use any unit — feet, inches, yards or meters.
- Split odd shapes into rectangles, circles and triangles, and add each one with “Add another area”.
- Pick a size and the joint width; the extra percentage covers cuts and breakage.
- Optionally enter a price to estimate the cost.
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Frequently asked questions
How many bricks are in a square foot?
About 6.9 modular bricks (2 1/4 × 7 5/8 in) with 3/8 inch mortar joints; many estimators round this to 7.
How many bricks do I need for a 10 × 8 ft wall?
80 square feet × 6.86 ≈ 549 bricks, or 576 with 5% extra.