How Many Bricks Do I Need for a Wall? (2026 Guide)
How many bricks do I need? Multiply the wall's net square footage by 6.5 (modular brick, 3/8 in joint), add 10% waste and round up — see the formula, size chart and example.
What size brick does this guide use?
Estimates here assume the standard modular brick — 3-5/8 in wide × 2-1/4 in tall × 8 in long — laid with a 3/8 in mortar joint. At that size, a square foot of wall takes about 6.5 bricks, mortar included. Counts shift with the real brick dimensions and joint width on your job, so treat these as planning numbers and confirm with your supplier's actual brick before ordering.
The brick math, step by step
We'll work a 10×8 ft wall with one window as the example — your wall uses the same four steps.
1. Measure the wall in square feet, minus openings
Multiply the wall's length by its height, then subtract every window and door so you don't pay for bricks you'll never lay. Our example wall: 10 × 8 = 80 sq ft. A 3×5 ft window takes out 15 sq ft, leaving a 65 sq ft net wall.
2. Multiply the net area by 6.5
Each square foot needs about 6.5 modular bricks: 65 × 6.5 ≈ 423 bricks — the exact-fit count.
3. Add 10% for waste and cuts
Bricks crack in transit, and openings, corners and edges force cuts you can't reuse. At 10%: 423 × 1.10 ≈ 465 bricks.
4. Round up to a whole brick
You can't order part of a brick, so round up to 466 bricks. Check your own measurements in the brick calculator.
Bricks for common wall sizes
Counts below assume net wall area — windows and doors already deducted — at 6.5 bricks per sq ft, with the 10% cushion rounded up to a whole brick:
| Wall area (sq ft) | Bricks (exact fit) | Bricks (+10%) |
|---|---|---|
| 50 | 325 | 358 |
| 100 | 650 | 715 |
| 150 | 975 | 1,073 |
| 200 | 1,300 | 1,430 |
| 300 | 1,950 | 2,145 |
A plain rectangle with one or two small openings usually fits inside the +10% plan; walls full of windows, doors or corners eat more in cuts — when in doubt, add a few extra bricks rather than running short mid-project.
Brick buying tips
- Order the full 10% extra — it covers breakage in delivery plus the half-bricks and odd cuts around openings, corners and edges; leftover bricks are handy for future repairs.
- Buy from one lot — bricks from the same kiln run match in color, while a second delivery can come back visibly lighter or darker; order everything at once.
- Watch the joint width — a wider 1/2 in joint fills more of the wall than a 3/8 in one, so slightly fewer bricks cover the same square footage, and a tighter joint needs a few more.
The same measure-then-estimate playbook works for concrete for a 10×10 slab and paver base, gravel and sand for the hardscaping next to your wall.
FAQ
How many bricks are in a square foot?
With a standard modular brick — 3-5/8 × 2-1/4 × 8 in — and a 3/8 in mortar joint, plan on about 6.5 bricks per sq ft of wall, mortar included. Bigger or smaller bricks change the rate, so confirm your supplier's dimensions first.
Should I add 10% extra bricks to my order?
Yes. Bricks crack during delivery, and openings, corners and edges force cuts you can't reuse. Ordering about 10% extra covers that waste — and leftover bricks from the same lot stay color-matched for future repairs.
Does a 1/2 in mortar joint change how many bricks I need?
Yes, slightly. A wider 1/2 in joint fills more wall area than a 3/8 in joint, so each brick covers a slightly bigger share of the wall and you need a few less bricks per sq ft. The difference is small — a few bricks per hundred — but if your joint width isn't 3/8 in, ask your supplier.
Need a different size?
Our free calculators give you the exact answer in seconds.