Brick Calculator

Our Brick Calculator helps you plan masonry projects. Here's how to use it:

Step 1: Enter wall dimensions (height and length) in meters.

Step 2: Select brick size — Standard (230×75 mm) or Modular (190×90 mm).

Step 3: Choose wall thickness: Single for a standard single-layer wall, or Double for an insulated two-layer construction.

Step 4: Optionally enter the total area of openings (doors and windows) to subtract from the wall area.

Step 5: Click 'Calculate Bricks' to instantly see the total bricks needed, wall area, net area, and estimated mortar bags required.

The calculator automatically adds a 5% wastage buffer to account for cuts, breakage, and edge trimming.

Brick calculations account for mortar joints:

bricks needed = (Net Area) / ((brick length + t) × (brick height + t))

Where: - Net Area = Wall Length × Wall Height − Openings Area - brick length = length of one brick (mm) - brick height = height of one brick (mm) - t = mortar joint thickness (10 mm standard)

The area each brick covers — including its shared mortar joint — is found by adding the mortar thickness to both the length and height before multiplying. The net wall area (in mm²) is then divided by this per-brick area to give the count.

For a double wall, the brick count is doubled. A 5% wastage is added to the final count to account for cuts and breakage.

The Brick Calculator estimates how many bricks you need to construct a wall of specific dimensions, factoring in mortar joint thickness and wall type. Rather than relying on rough guesses that often lead to costly shortfalls or unnecessary excess, this tool uses precise geometric calculations to give you a reliable material count before you ever place an order.

At the heart of the calculation is a simple idea: each brick occupies not just its own footprint, but also the thin layer of mortar applied to one face and one end. A standard mortar joint of 10 mm is added to both the length and the height of the brick. The resulting composite area — brick plus mortar — is how much wall surface each brick actually covers. Dividing the total net wall area by this value gives the number of bricks required.

Wall type matters significantly. A single-wythe wall uses one layer of bricks and is suitable for garden walls, boundary walls, and partition walls. A double-wythe wall consists of two parallel layers, often with insulation sandwiched between them, and is used in load-bearing exterior walls for greater structural strength and thermal performance. Selecting the correct wall type will double or single the brick count accordingly.

Why Does Wastage Matter? No masonry project is cut-and-dry. Bricks must be cut to fit corners, window reveals, and door openings. Some arrive chipped or crack during handling. A standard allowance of 5% is built into this calculator, but for complex projects with many openings or non-rectangular shapes, ordering an additional 5–10% over your calculated count is a prudent safety margin.