How many bricks do you need for 100 square feet?

A 100 sq ft wall of modular brick takes 675 bricks — buy 709 with 5% for waste — and about 20 bags of 80 lb mortar mix.

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%
sq ft
sq ft
pcs

6.75 for modular brick with 3/8 in joints.

pcs

Quikrete Mortar Mix: up to 37 bricks per bag.

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Your results

Bricks needed709
80 lb bags of mortar mix20
Wall area100 sq ft
Bricks per sq ft6.75
How many bricks do you need for 100 square feet — diagram

Bricks and mortar for 100 sq ft

WasteBricks80 lb mortar bags
0%67519
5%70920
10%74321

100 sq ft is, for example, a wall 25 ft long and 4 ft high. A two-wythe (double-thick) wall needs twice as many bricks.

The math

100 sq ft × 6.75 × 1.05 = 709 bricks 709 ÷ 37 per bag = 20 bags of mortar

Common questions

How many bricks for 100 square feet?

675 modular bricks, or 709 with 5% waste.

Want the full method, tips and other sizes? See the brick calculator guide.

Last reviewed November 1, 2026. Results are estimates — confirm with your supplier.

Similar sizes

25 sq ft wall50 sq ft wall150 sq ft wall200 sq ft wall300 sq ft wall500 sq ft wall

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