Brick Calculator

Who Uses a Brick Calculator and Why

A brick calculator helps anyone planning a masonry wall figure out how many bricks and how much mortar to buy before they place an order. Homeowners use it to price a garden wall or a brick veneer, while builders, bricklayers, and estimators use it to turn a set of wall dimensions into a material list quickly. Instead of guessing, you get a count that reflects the real face size of the brick and the mortar joint between each one.

The tool is useful at two stages. Early on, it gives a fast budget figure so you can compare brick types and see how the total changes. Closer to the build, it produces the order quantity, including a waste allowance for cuts and breakage. Because it runs in your browser and needs no account, you can rerun it as your plan changes without losing time.

Projects Where This Calculator Helps

• Garden and boundary walls: Work out bricks for freestanding walls where both faces may be visible and neatness matters.
• Brick veneer and facing: Estimate a single skin of face brick over a timber or block backing wall.
• Extensions and outbuildings: Size the brick order for a small extension, garage, or workshop wall.
• Repairs and matching: Order a few extra bricks in the same size and type to keep for future patch repairs.
• Landscaping features: Plan planters, low seat walls, and pillars where brick counts are easy to underestimate.

How the Brick Count Is Calculated

The calculator starts with the wall area, which is length times height after both are converted to a common unit. It then works out how many bricks cover one square foot using the brick's real face size with a 3/8 inch mortar joint added to the length and the height. For a modular brick that face becomes 8 inches by 2.625 inches, which is about 0.146 square feet, or roughly 6.86 bricks per square foot. Multiplying the wall area by the bricks per square foot gives the raw count, and the waste percentage is added on top before rounding up.

The mortar figure is a simple planning estimate of about one bag of mortar mix per 35 bricks, which sits inside the common one bag per 30 to 40 bricks range. Real usage depends on joint thickness, brick absorption, and how the mortar is mixed, so treat the bag count as a guide and confirm both the brick and mortar quantities with your supplier or against local building code before you order.

Brick Size Coverage Reference

Common Mistakes and Tips

The biggest mistake is counting bricks by their nominal size without the mortar joint, which overstates how many you need because it ignores the space each joint takes up. Another is forgetting waste, since real jobs always lose some bricks to cuts at corners and around openings. Do not subtract door and window areas too aggressively either, as those openings often need extra bricks for reveals and returns, and a small buffer protects you from a short order.

For a full material list, pair this tool with related estimators. Use the concrete calculator for footings and foundations under the wall, the paver calculator for any adjoining patio or path, and the tile calculator if you are finishing a nearby surface with tile.

People Also Ask

How many bricks are in a square foot of wall?

For a standard modular brick with a 3/8 inch mortar joint, you need about 6.86 bricks per square foot, which many builders round up to 7 for a quick estimate.

How many bricks do I need for a 10 by 10 foot wall?

A 100 square foot wall in modular brick needs about 686 bricks before waste, or roughly 755 after adding a 10% waste allowance.

How thick is a standard mortar joint?

A 3/8 inch joint is the standard used in most brickwork, and this calculator uses that value when working out how many bricks fit in each square foot.

How much mortar do I need for bricklaying?

A common planning figure is about one bag of mortar mix for every 30 to 40 bricks. This tool uses one bag per 35 bricks as a middle estimate.

Should I subtract windows and doors from the wall area?

You can subtract large openings, but leave a margin because reveals and returns around openings often need extra bricks, and it is safer to order a little more.

What waste percentage should I use for bricks?

Around 10% suits straight walls, while 15% is safer for jobs with many corners, curves, or angled cuts where breakage tends to be higher.

Does brick size change how many I need?

Yes. Larger bricks such as king or utility cover more wall each, so you need far fewer of them than smaller modular or standard bricks.

Can I use this calculator for a double brick wall?

The tool estimates a single skin of brick. For a double skin wall, run the calculation and then double the brick count for the two layers.