Masonry
How many bricks for a 20×20 patio?
Quick Answer
A 20×20 foot patio (400 sq ft) requires approximately 1,800–2,000 standard 4×8-inch bricks laid flat, including a 10% waste allowance. Larger bricks (6×9") reduce the count to about 1,100. Always add 10–15% extra for cuts, breakage, and future repairs.
Quick Reference Table
| Brick size | Bricks for 20×20 patio |
|---|---|
| Standard 4×8" | ~1,800 bricks (+10% waste) |
| Queen 3×7.6" | ~2,400 bricks |
| 6×9" paver | ~1,100 bricks |
| 4×4" paver | ~3,600 bricks |
How to Calculate It Yourself
- 1
Calculate patio area: 20 × 20 = 400 sq ft.
- 2
Find brick coverage: a 4×8" brick = 0.222 sq ft.
- 3
Divide: 400 ÷ 0.222 = 1,802 bricks.
- 4
Add 10% for waste: 1,802 × 1.10 = 1,982 → order 2,000 bricks.
Pro Tip
For a patio, use paving bricks (SW grade — Severe Weathering) rated for ground contact. Standard facing bricks are not freeze-thaw resistant when laid flat and will crack within a few winters.
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