How do you calculate brick square footage?

Multiply the wall's length by its height to get the gross area, then subtract about 21 sq ft per door and 15 sq ft per window. The result is the brick-covered area. For a 20 ft × 8 ft wall with one window, that's 160 − 15 = 145 square feet of brickwork.

How many bricks are in a square foot?

About 7 standard modular bricks cover one square foot once mortar joints are included. Larger bricks cover more: a queen size runs about 6 per square foot and a utility brick about 4.5. Always check the brick size you're buying, because the count per square foot changes the total order significantly.

Do you subtract windows and doors from brick square footage?

Yes. Subtract the opening areas — roughly 21 sq ft per standard door and 15 sq ft per window — from the gross wall area before multiplying by bricks per square foot. Skipping this step over-orders brick and mortar. Keep a little of the saved material as spares for future repairs.

How much extra brick should I order for waste?

Add 5–10% to the calculated brick count. The waste covers cuts at corners, around window and door openings, and along any decorative coursing, plus a few bricks that crack during delivery and handling. Ordering from a single lot also protects against color variation if you need to reorder later.

Brick Square Footage Calculator

Fórmula y guía

Cómo se calcula

Brickwork is estimated from wall area. Because bricks are laid with mortar joints, the brick count per square foot already accounts for the mortar spacing, so you work from the finished wall face.

1Measure each wall's length and height in feet and multiply them for the gross area.
2Subtract about 21 sq ft per door and 15 sq ft per window to get the net wall area.
3Multiply the net area by 7 to estimate the number of standard modular bricks.
4Add a 5–10% waste allowance for cuts, corners, and breakage.

Wall (20 ft × 8 ft)	160 sq ft
− one window	−15 sq ft
Net wall area	145 sq ft
× 7 bricks/sq ft + 10%	≈ 1,120 bricks

Precisión y supuestos

Standard modular bricks average about 7 per square foot including mortar joints.
Door and window openings are subtracted from the gross wall area.
A 5–10% waste factor covers cut bricks at corners, openings, and breakage.
Brick size matters — utility and queen sizes cover more area, so bricks per sq ft drops.

Consejos y reglas clave

Bricks per square foot: ~7 for standard modular, ~6 for queen, ~4.5 for utility.
Estimate mortar at roughly one bag per 100–125 bricks laid.
Brick veneer covers the wall face; a structural double-wythe wall needs about double.
Order from the same lot where possible so color and texture stay consistent.

How to calculate brick square footage and brick count

Brick estimating starts with the same measurement as any wall project: area. Measure the length and height of each wall in feet and multiply them, then add the walls together and subtract the openings. This net figure — the actual brick-covered surface — is your brick square footage. Because bricks are always laid with mortar between them, the industry works from a simple rule of thumb rather than the raw size of a single brick: about seven standard modular bricks cover one square foot once the mortar joints are included.

Once you have the net wall area, multiply by seven for a standard-modular brick count, then add a waste allowance. If your wall is a plain rectangle you can use the wall square footage calculator to get the paintable-style net area quickly, then apply the brick multiplier here.

Why brick size and waste change the count

Not every brick covers the same area. A standard modular brick gives roughly seven per square foot, but larger utility bricks cover more ground — closer to four and a half per square foot — so always confirm the size you're buying before ordering. Getting this wrong is the most common estimating mistake, because a small change in bricks-per-square-foot multiplies across a whole wall.

Add 5–10% for waste. Corners, window and door surrounds, and any decorative coursing all require cut bricks, and a few will crack during handling. If you're comparing brick to another cladding, the siding square footage calculator uses the same net-area approach so you can weigh the two on equal footing.

Don't forget the mortar

Bricks are only part of the order. Plan on roughly one bag of mortar mix for every 100–125 bricks laid, though this varies with joint thickness and the mason's technique. For a full project budget, take the brick and mortar quantities into the square footage cost calculator with your local unit prices to turn the material list into a dollar figure.

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