Brick Calculator

A brick is quoted at 215 × 102.5 × 65 mm, and a square metre of half-brick wall holds about 60 of them only if the joints are 10 mm. Build with a 12 mm joint and the count falls, build with 8 mm and it rises, and on a thousand-brick wall the difference is several pallets. That is why the calculator asks for the joint rather than assuming one.

Wall thickness matters just as much. A half-brick wall is 102.5 mm of masonry plus finish, a one-brick wall is 215 mm, and a cavity wall is two leaves with a gap that is not brick at all. Enter the equivalent solid thickness, or calculate each leaf and add the results.

Openings are deducted from the area but they increase the cut waste. Every window and door corner forces a bond break, so a facade with many small openings needs 10 % spare where a plain wall needs 5 %. Decorative bonds, arches and piers push it higher again, and the extra bricks are not recoverable.

Keep the spare as whole bricks from the same batch. Brick is fired in batches and the colour of the next pallet can differ visibly, especially with a stock brick or a handmade one, so a hundred bricks in reserve are a colour match as much as a quantity.

Mortar volume follows the wall volume, not the faces you see: a standard-format wall uses roughly 0.02 to 0.03 m³ of mortar per square metre of wall. The cement mortar calculator converts that into cement and sand, so the two pages are meant to be used together.

Bricks arrive on pallets of 300 to 500 and are usually priced per pallet. Order whole pallets, keep them wrapped until the day they are laid, and plan where the pallet sits: a ton of brick on soft ground in October sinks and takes the bottom courses with it.