Wall face estimate

Brick Calculator

Estimate bricks for one rectangular wall face using brick face size, mortar joint, and waste allowance.

Wall and brick face

Enter masonry dimensions

Brickwork
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Quantity summary

Brick estimate

Running-bond brick wall showing wall dimensions, brick face, and mortar joint
This estimate covers one wall face and does not automatically deduct doors or windows.

Your brick estimate will appear here

Enter wall size, brick face dimensions, joint thickness, and waste.

What is Brick Calculator?

A brick estimate starts with wall face area and the area covered by one brick plus its mortar joints. This calculator divides a rectangular wall’s area by that repeated face module, then adds an entered percentage for waste. It is a materials-planning estimate rather than a structural design or a complete masonry specification.

The calculation covers one face layer and does not automatically deduct doors or windows. For cavity walls, multiple leaves, piers, returns, corners, or other details, prepare a separate takeoff for each part instead of treating the result as a complete order.

How to Use This Calculator

  1. Enter wall length and height using the units shown beside each field. The calculation treats their product as a complete rectangular face.
  2. Enter brick length and height as actual face dimensions, with millimetres, centimetres or inches selected correctly.
  3. Enter mortar joint thickness. The program adds one joint thickness to each face dimension to create a repeated brick-and-joint module.
  4. Enter wastage as a percentage, such as 5 for 5%. Choose a project-appropriate allowance rather than assuming one universal percentage.
  5. Calculate and read the base count and the required count with waste. Waste is applied before the final quantity is rounded upward.
  6. Keep additional wall leaves, openings, bond, corners and special units on a separate takeoff.

Formula Used

Wall face area =L×H. Brick module area =(brick length+joint)×(brick height+joint). Base count =wall area/module area. Required count =ceiling[base count×(1+waste%/100)].

Variables Explained

InputMeaning in this calculator
Wall length and heightDimensions of one rectangular wall face, converted internally to metres.
Brick length and heightThe visible face dimensions before adding the mortar joint.
Mortar joint thicknessAdded once to brick length and once to brick height to approximate a repeated module.
Brick wastagePercentage increase applied to the unrounded base count.

Worked Example

Take a wall 5 m long and 2 m high, giving 10 m². Use bricks 190 mm long and 90 mm high with 10 mm mortar joints. Converted dimensions are 0.19 m, 0.09 m and 0.01 m. The module is (0.19+0.01)×(0.09+0.01) = 0.20×0.10 = 0.02 m². Base count is 10/0.02 = 500 bricks.

With 5% waste, the total becomes 500×1.05 = 525 bricks. The model treats every repeat as a full module; real edge conditions and bond arrangements can alter the count.

Why Use This Calculator?

The final count is an estimate of individual units for the stated face module. It does not calculate mortar volume, wall strength, load capacity, reinforcement or a foundation. It also does not know how many bricks come in a pack, so purchasing may require another rounding step after checking supplier quantities.

For openings, a separate area takeoff can improve the geometric estimate, but returns, lintels, reveals and bond details may add requirements that are not captured by simply subtracting a rectangle. The wall dimensions and brick specification should match the intended design. Mortar thickness has a visible effect because it changes both module dimensions: larger joints cover more wall area per brick and lower this simplified count. That mathematical effect is not a recommendation to change the joint size specified for a project.

Common Mistakes

  • Do not use a one-face result as the total for a cavity wall or multiple wall leaves.
  • Do not include the mortar joint twice if your dimensions already describe a coordinated brick-and-joint module.
  • Do not confuse millimetres and centimetres in brick and joint fields.
  • Do not treat a calculated quantity as confirmation that the wall design is safe or appropriate.

Frequently Asked Questions

Does brick width affect the result?

Not in this version. The controller converts the entered width but does not use it in the face-area formula. A quantity model for a particular bond or wall thickness would need additional geometry. Keep that limitation in mind when interpreting the required width field.

Can I calculate a double-layer wall?

The current Double option does not change the count. Estimate the required faces or layers separately and combine them using the actual design. Do not simply trust the dropdown to apply a multiplier that the code does not implement.

Why is mortar added to length and height?

The repeated face module includes one horizontal and one vertical joint allowance. This estimates how much wall area one repeating unit occupies. Exact boundaries and bond layouts may differ, so the area division is a planning approximation rather than a detailed brick-by-brick layout.

Does wastage include pack rounding?

No. The entered waste percentage increases the count, then the total is rounded upward to an individual brick. A supplier may sell only complete packs or pallets. Apply that purchase constraint separately after checking the required brick type and available pack size.

Should I subtract window and door areas?

The form has no openings control. A takeoff can account for openings separately, but edge details and special units may also be needed. Use the design rather than treating a simple rectangular subtraction as the entire masonry specification.

Sources & References