Quick start
- Use Wall dimensions when you measured length and height. The calculator multiplies them for gross wall area.
- Enter the combined square feet of doors, windows, and other openings. The calculator subtracts them before brick coverage and waste.
- Use actual visible brick face dimensions with the planned joint, or switch to Coverage table when you have bricks per 100 square feet for the exact product.
- Add a waste percentage for cuts, breakage, corners, bond pattern, and color matching.
Best uses
Use this guide for a simple single-face brick count before a supplier or mason checks bond, corners, wall thickness, cuts, and the full material takeoff.
- Estimate brick count from wall length and height.
- Subtract measured door and window openings before adding waste.
- Use actual brick face dimensions and mortar joint thickness.
- Use a supplier or BIA bricks-per-100-square-feet table.
What this calculator is solving
This guide compares brick-dimension math with supplier or Brick Industry Association coverage tables.
Match each input label on the calculator to wall length and height or gross wall area, opening area, brick face dimensions and mortar joint, or a coverage-table rate, plus waste percent.
The formula in plain language
In plain language: Dimension method: gross wall area = length x height, net area = gross area - openings, bricks per square foot = 144 / ((brick length + joint) x (brick height + joint)), and bricks = ceiling(net area x coverage x (1 + waste / 100)). Coverage-table method: bricks = ceiling(net area x bricks per 100 square feet / 100 x (1 + waste / 100)). The examples on the page are there so you can compare your inputs with a brick-wall example before copying the answer.
The dimension method finds net wall area, calculates bricks per square foot as 144 divided by the brick-and-joint module, applies waste, and rounds up. Coverage-table mode multiplies net area by bricks per 100 square feet, applies waste, and rounds up.
How to read the answer
Read net wall area first, then check the base count and final whole-brick order. If the dimension and table methods differ, use the method tied to the exact product and joint you will buy.
- A 20 ft by 8 ft wall has 160 ft2 of gross face area. Subtracting a 24 ft2 opening leaves 136 ft2.
- A 7.625 by 2.25 inch brick with a 3/8 inch joint creates an 8 by 2.625 inch repeating face module, or about 6.857 bricks per square foot.
- The base count is about 932.57 bricks. Adding 10% waste gives 1,025.83, so the whole-brick estimate rounds to 1,026.
- Using a table rate of 675 bricks per 100 ft2 on a 120 ft2 wall gives 810 bricks before waste and 891 after 10% waste.
Common mistakes to avoid
Do not switch between actual face dimensions, nominal dimensions, and supplier coverage halfway through the calculation. Also keep brick count separate from mortar quantity and structural wall design.
- Do not forget to subtract openings before applying the brick coverage and waste allowance.
- Do not compare dimension math with a table for a different brick designation or mortar joint.
- Do not ignore bond pattern, corners, piers, returns, cuts, wall thickness, and broken pieces.
- Do not use this simple face estimate for structural wall design, retaining walls, chimneys, or load-bearing masonry.
- Estimate mortar, wall ties, lintels, flashing, weep holes, cleanup, and labor separately.
Brick Calculation Formula From Dimensions
Gross wall area = wall length x wall height. Net wall area = gross wall area - openings. Bricks per square foot = 144 / ((brick length + joint) x (brick height + joint)).
Whole bricks = ceiling(net wall area x bricks per square foot x (1 + waste percent / 100)). The 144 converts the repeating brick-and-joint face from square inches to one square foot.
Why a BIA or Supplier Table Can Be Better
Brick Industry Association Technical Note 10 lists rates by brick designation and joint. Its modular-brick example uses 675 bricks per 100 ft2 with a 3/8 inch joint, while other brick formats have different rates.
Use Coverage table mode when the exact product sheet gives a rate. This avoids forcing a simplified face formula to match nominal coursing or supplier estimating conventions.
Why This Is Not a Brick Mortar Calculator
BIA mortar tables change with brick designation, joint thickness, brick width, bedding, hollow units, collar joints, and correction factors. A fixed bags-per-brick shortcut can look precise while describing the wrong wall assembly.
This page keeps the brick count honest. Use the exact mortar product yield and the project masonry specification for cement, sand, or bag quantities.
Patio and Floor Brick Need a Different Plan
The wall calculator uses face coverage and a mortar joint. A patio or floor may need bedding, base depth, drainage, edge restraint, pattern cuts, and a different joint.
Use the Paver Calculator for a flat hardscape count, then confirm that the selected brick is rated for the installation.
Research and references
The Brick Industry Association table supplies brick-per-100-square-feet and mortar-volume examples by brick designation and joint. Glen-Gery shows why face size and pieces per square foot vary by product.
Worked examples for Brick Calculator
1,026 bricks
906 bricks
891 bricks
136 ft2 net wall area
Different brick coverage
FAQ in plain language
When should I use the Brick Calculator?
Use it when your task matches one of these common needs: Estimate brick count from wall length and height. Subtract measured door and window openings before adding waste. It works best when you already know wall dimensions or area, opening area, brick dimensions or supplier coverage, mortar joint, and waste percent.
What is the Brick Calculator doing with my inputs?
In plain language: Dimension method: gross wall area = length x height, net area = gross area - openings, bricks per square foot = 144 / ((brick length + joint) x (brick height + joint)), and bricks = ceiling(net area x coverage x (1 + waste / 100)). Coverage-table method: bricks = ceiling(net area x bricks per 100 square feet / 100 x (1 + waste / 100)). The examples on the page are there so you can compare your inputs with a brick-wall example before copying the answer.
What do the main Brick Calculator inputs mean?
Wall dimensions: the gross wall length and height before doors and windows are removed. Openings: the combined door, window, and other area subtracted from the gross wall face. Brick dimensions: the visible face length and height of one brick in inches. Mortar joint: the planned gap between bricks, included in the face coverage estimate. Coverage table: bricks per 100 square feet for the exact brick designation and joint from a supplier or BIA table. Waste percent: extra bricks for cuts, breakage, corners, bond pattern, and color matching.
How should I read the Brick Calculator answer?
Read the headline estimate first, then check the material, waste, coverage, and unit lines. For project tools, the supporting lines are often the difference between a rough idea and a list you can actually shop from.
What should I double-check before trusting the answer?
Brick counts can change with supplier coverage tables, bond pattern, corners, piers, returns, cuts, wall thickness, damaged units, mortar, ties, flashing, and professional masonry layout. Also check whether your brick dimensions are actual face dimensions, whether the coverage rate matches the exact joint, and whether openings were already subtracted.
Which Brick Calculator mode should I use?
Use Wall dimensions when you measured length and height, Known area when you already have gross square feet, or Coverage table when a supplier or Brick Industry Association table gives bricks per 100 square feet for the exact unit and joint.
Should I use a 3/8 inch mortar joint?
Use 3/8 inch only if it matches your plan or supplier guidance. The Brick Industry Association tables often show 3/8 inch and 1/2 inch joint examples, and changing the joint changes brick coverage.
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Keep exploring
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