Calculating your bricks needed is straightforward once you know the Brick formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Brick Calculator.
What is Brick?
The Brick calculation tells you your bricks needed from a few simple inputs. The figure you are solving for here is the bricks needed.
The Brick formula
This calculation combines several inputs through a multi-step method rather than a single one-line formula. Enter the values below and the calculator resolves each step in order. The inputs it needs are:
- Wall area — a value measured in sq ft. Example: 100 sq ft.
- Bricks per sq ft — a number. Example: 7.
- Wastage allowance — a percentage, such as an annual rate. Example: 5%.
How to calculate it step by step
- Write down the wall area (for example, 100 sq ft).
- Write down the bricks per sq ft (for example, 7).
- Write down the wastage allowance (for example, 5%).
- Apply the formula above to get your bricks needed.
- Double-check the result with the Brick Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Wall area | 100 sq ft |
| Bricks per sq ft | 7 |
| Wastage allowance | 5% |
| Bricks needed | 735 |
With wall area of 100 sq ft, bricks per sq ft of 7 and wastage allowance of 5%, the bricks needed works out to 735.
Example 2
With wall area of 200 sq ft, bricks per sq ft of 7 and wastage allowance of 5%, the bricks needed works out to 1,470.
| Result | Value |
|---|---|
| Bricks needed | 1,470 |
Example 3
With wall area of 50 sq ft, bricks per sq ft of 7 and wastage allowance of 5%, the bricks needed works out to 368.
| Result | Value |
|---|---|
| Bricks needed | 368 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Brick Calculator does it instantly, for free, with the formula and a worked example built in.
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