Zerdly

Brick Wall Calculator

Calculate how many bricks and how much mortar you need for a wall from its dimensions and brick size, free in your browser.

100% FreeRuns in your browserBasic
How to use this calculator

Enter Values

Minimum 0

Minimum 0

Enter your values and press Calculate to see results.

Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.

How to use this calculator

  1. Enter the wall length and height.
  2. Optionally adjust the brick size and mortar joint (defaults to a standard 230 × 76 mm brick with a 10 mm joint).
  3. For double brick or a thicker wall, enter the wall thickness (≈ 230 mm for double brick) — the count scales by the number of brick layers.
  4. For brick columns (piers), either enter a total number of columns, or enter a column spacing to place one every so many metres — and set the bricks per course to match your pier size (defaults to 4).
  5. Press Calculate for the wall area and the number of bricks needed.

How it works

The calculator works out the wall area (length × height) and divides it by the face area of one brick plus its mortar joint. A standard Australian brick is 230 × 76 mm, which with a 10 mm joint covers 240 × 86 mm.

It multiplies by the number of brick layers (skins) — the wall thickness divided by the brick width, so a single skin counts once and double brick counts twice — then adds 10% for cuts and breakages.

Brick columns (piers) are optional and additive. Give a total, or a spacing — a spacing places a pier at each end of the wall plus one roughly every so many metres. Each pier is as tall as the wall (height ÷ course height) and uses the bricks-per-course you set, and the total includes both the wall and the piers.

Worked example

A 6 m × 2.4 m double-brick wall. Area = 14.4 m². A 230 mm wall thickness ÷ 110 mm brick width = 2 layers, so the single-skin count is doubled.

Common mistakes

  • Ignoring the mortar joint — it changes how many bricks fit per square metre.
  • Forgetting wall thickness — a double-brick wall needs roughly twice the single-skin count.
  • Not adding a breakage allowance (usually around 5–10%).

Frequently asked questions

How do I do double brick or a thicker wall?

Enter the wall thickness — about 230 mm for double brick, or more for a thicker wall. The calculator works out the number of brick layers and multiplies the bricks accordingly.

How many extra should I order?

The result already adds 10% — order a little more again for complex layouts or feature courses.

Can it include brick columns or piers?

Yes. Enter a total number of columns, or a column spacing to place one at each end and roughly every so many metres. Set the bricks per course to match your pier (a 1½-brick pier is about 3–4 per course, a 2-brick square pier about 4–5). The pier bricks are added to the wall total; piers also need a little extra mortar beyond the wall estimate.

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Cite this tool

Zerdly. (2026). Brick Wall Calculator. Retrieved from https://www.zerdly.com/tools/brick-wall-calculator/

Tip: Enter any known values to calculate the remaining results.

All calculations run in your browser. Your inputs are never saved or transmitted.