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Brick Calculator

Calculates how many bricks a wall needs from its area, the brick size and the mortar joint, with a breakage allowance.

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Enter your figures and press Calculate.
In short Brick Calculator is a free online tool on inputtesthub.com that calculates how many bricks a wall needs from its area, the brick size and the mortar joint, with a breakage allowance. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.

How to use the Brick Calculator

  1. Enter your figures in the input fields.
  2. The result updates as you type, together with the full working.
  3. Check the breakdown table to see exactly how the number was reached.

About the Brick Calculator

The Brick Calculator calculates how many bricks a wall needs from its area, the brick size and the mortar joint, with a breakage allowance. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.

What people use it for

  • Ordering bricks for a boundary wall.
  • Checking a mason’s quantity.
  • Comparing single-skin and double-skin cost.

Details

Pakistan / India standard19 × 9 × 9 cm
UK standard21.5 × 6.5 × 10.25 cm
Typical mortar joint10 mm
Bricks per m², 19×9 with 1 cm joint≈ 50

The maths behind it

This tool uses Bricks per m² = 1 ÷ ((brick length + joint) × (brick height + joint)). Multiply by wall area, wall thickness in bricks, and the breakage allowance. Every intermediate value is shown on screen, so the result can be checked by hand.

The default 19 × 9 cm is the standard brick across Pakistan and much of India. A UK or US brick is a different size, so set the dimensions to the brick you are actually buying or the count will be well out.

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Frequently asked questions

How many bricks in 1 square metre?
For a 19 × 9 cm brick with a 1 cm mortar joint, about 50 per square metre for a single-skin wall. A UK 215 × 65 mm brick gives about 60. Enter your brick size above for the exact figure.
How much breakage should I allow?
Five per cent for good bricks delivered on a pallet, and closer to ten for hand-unloaded local stock where more arrive chipped or cracked.
Are there any usage caps on the Brick Calculator?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the page.
Is what I paste into the Brick Calculator stored?
No. The Brick Calculator runs entirely in your browser using JavaScript. Your input never reaches inputtesthub.com or any third party — open your browser's Network tab while you use it and you will see no request go out.
Can I check the maths myself?
It uses Bricks per m² = 1 ÷ ((brick length + joint) × (brick height + joint)). Multiply by wall area, wall thickness in bricks, and the breakage allowance. The full working is printed under the result, so you can follow every step rather than trusting a black box.
Who is the Brick Calculator for?
In practice it gets used for three things: ordering bricks for a boundary wall. Checking a mason’s quantity. Comparing single-skin and double-skin cost. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there a catch?
The default 19 × 9 cm is the standard brick across Pakistan and much of India. A UK or US brick is a different size, so set the dimensions to the brick you are actually buying or the count will be well out.
What figures does the Brick Calculator work from?
Pakistan / India standard is 19 × 9 × 9 cm. UK standard is 21.5 × 6.5 × 10.25 cm. Typical mortar joint is 10 mm. These are printed on the page itself, so you do not have to take them on trust.
Is the number rounded?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.

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