Question 1

How many bricks do I need per square foot of wall?

Accepted Answer

For a standard single-skin (4-inch) wall using a modular brick (3-5/8 x 2-1/4 in face with 3/8 in mortar joint) you need about 7 bricks per square foot. A double-skin (9-inch) wall needs roughly 14 bricks per square foot. Our calculator does this automatically once you enter the wall and brick dimensions.

Question 2

How is the brick count calculated?

Accepted Answer

The wall area (length x height) is divided by the face area of one brick including the mortar joint (brick width + joint) x (brick height + joint). The result is multiplied by the number of wythes (wall thickness in brick layers) and a wastage factor (typically 5-10%) to allow for cuts and breakage.

Question 3

What wastage percentage should I add?

Accepted Answer

Most masons add 5% for simple straight walls and 10-15% for walls with many cuts, curves, openings or pattern work. The default of 5% is a safe minimum — you can change it in the calculator.

Question 4

What are common brick sizes?

Accepted Answer

Standard US modular brick is 7-5/8 x 3-5/8 x 2-1/4 in. Standard UK brick is 215 x 102.5 x 65 mm. Queen size is about 7-5/8 x 2-3/4 x 2-3/4 in and King size is roughly 9-5/8 x 2-3/4 x 2-3/4 in. Pick a preset or enter your own dimensions.