A Brick Calculator estimates how many bricks are needed to cover a wall after allowing for doors, windows, mortar joints, and a selected amount of extra material.

The calculation is based on the visible face of the brick, not its full depth through the wall. That makes the tool useful for straightforward wall faces and veneer quantities, while corners, arches, piers, decorative bonds, special shapes, and structural masonry still need to be reviewed separately.

Measure the actual brick-covered wall area, use the brick face dimensions and mortar joint, then add extra units for cuts and breakage.

Start with the wall you will actually brick

Measure the length and height of each wall section.

For a simple rectangular wall:

Wall area = Length × Height

If several walls use the same brick, calculate each one and add them together.

Then subtract large openings that will not contain brickwork:

Net brick area = Total wall area − Door and window area

For example, a wall measuring:

20 ft × 8 ft

has:

160 ft²

of gross area.

If it contains a:

3 ft × 7 ft door

the opening area is:

21 ft²

So:

160 − 21 = 139 ft²

of net wall face remains.

How to use the Brick Calculator

1. Measure the wall length and height.
2. Add additional wall sections using the same brick.
3. Enter large doors and windows that should be deducted.
4. Enter the actual visible brick length and height.
5. Add the planned mortar-joint thickness.
6. Calculate the base number of bricks.
7. Add an allowance for cuts, breakage, selection, and layout.
8. Round the final order to the packaging used by the supplier.

Keep special brick shapes and decorative courses separate from the ordinary field-brick count.

The brick face is what controls the count

A brick has three dimensions, but the wall-face calculation normally uses only the dimensions visible in the elevation:

Brick face length

and:

Brick face height

The depth of the brick goes into the wall and does not determine how many bricks fit across the visible surface.

For example, a brick might measure roughly:

8 in long × 2.25 in high × 3.625 in deep

For a basic face count, the important measurements are:

8 in × 2.25 in

plus the mortar joints.

Mortar joints are part of the repeating module

Bricks do not normally sit directly against one another.

The joint occupies part of the wall face too.

For a basic regular layout:

Module length = Brick face length + Vertical joint

Module height = Brick face height + Horizontal joint

Then:

Module area = Module length × Module height

A quick theoretical brick count is:

Base bricks = Net wall area ÷ Module area

The calculator handles this more conveniently once all dimensions are entered in compatible units.

Keep the units consistent

Do not mix feet and inches directly in the same calculation.

If the wall is measured in feet and the brick in inches, convert one set first.

Useful relationships include:

1 ft = 12 in

1 ft² = 144 in²

For example, a:

20 ft × 8 ft

wall can also be expressed as:

240 in × 96 in

if you want to work entirely in inches.

The calculator can simplify this conversion, but the inputs still need the correct unit labels.

Worked brick estimate

Suppose you have:

Wall: 20 ft × 8 ft

Door: 3 ft × 7 ft

Gross wall area:

160 ft²

Door area:

21 ft²

Net brick area:

139 ft²

Now suppose the chosen brick and mortar-joint module works out to approximately:

6.75 bricks per ft²

Base brick count:

139 × 6.75 = 938.25

Round upward:

939 bricks

Calculation	Result
Gross wall area	160 ft²
Door opening	21 ft²
Net wall area	139 ft²
Approx. bricks per ft²	6.75
Calculated units	938.25
Base whole-brick count	939 bricks

That is the basic face quantity before any allowance for cuts, damage, decorative detailing, or supplier packaging.

Add allowance after the base count

The calculated wall face represents an ideal layout.

Real installations create additional demand through:

• cuts;
• broken bricks;
• chipped units;
• color selection;
• corner work;
• pattern alignment;
• special courses; and
• pieces that cannot be reused.

Apply the allowance after the regular face quantity has been calculated.

For example, if the base count is:

939 bricks

and the selected allowance is:

7%

then:

939 × 1.07 = 1,004.73

Round upward:

1,005 bricks

The supplier may then require another round to a full strap, cube, pallet, or other package quantity.

Running bond is the simplest case

A standard running-bond wall is relatively straightforward to estimate because the brick pattern repeats regularly.

Even then, cuts occur at:

• ends;
• corners;
• openings;
• transitions; and
• changes in wall length.

More decorative or complex bonds can change the practical quantity significantly.

Bond pattern can change material use

Not all brickwork uses the same face arrangement.

Examples include:

• running bond;
• stack bond;
• Flemish bond;
• English bond;
• soldier courses;
• rowlocks;
• headers;
• basket patterns; and
• decorative bands.

Some patterns use bricks in different orientations.

Others may expose the header face instead of the stretcher face.

The simple face-module calculation should therefore be treated as a starting point when the wall includes decorative bonds.

Soldier courses should be counted separately

A soldier course places bricks vertically.

That changes how many bricks are needed per linear foot.

For example, a soldier course above a window is better estimated from:

Opening width ÷ brick-and-joint module in the soldier orientation

rather than hiding it inside the main wall count.

The same principle applies to:

• rowlock sills;
• decorative headers;
• bands; and
• caps.

Separate calculations make the final order easier to verify.

Large openings reduce area but create more cuts

A door or window removes a significant amount of brick-covered area.

But openings also create:

• jamb cuts;
• head conditions;
• sill details;
• bond interruptions; and
• short pieces.

So subtracting a 20 ft² opening does not necessarily save exactly the number of whole bricks represented by 20 ft².

The area deduction is still useful, but the cutting allowance becomes more important when a wall has many openings.

Small penetrations may not be worth deducting

Small vents, pipes, boxes, or other penetrations often do not reduce brick quantity by much.

The surrounding bricks still need to be cut.

A small opening may even create more waste than it saves in area.

Deduct substantial openings.

Treat small penetrations as layout details unless they occupy meaningful wall area.

Corners need more than a flat wall calculation

An outside corner changes the bonding pattern.

Depending on the masonry system, it may require:

• cut bricks;
• special corner units;
• bond adjustments;
• additional ties; or
• special detailing.

A simple square-foot quantity does not describe the corner arrangement.

Keep corner details visible in the material takeoff rather than assuming the face count solves them automatically.

Returns should be measured as wall faces

Suppose a brick veneer wraps around the side of a doorway or window.

That return has its own visible brick area.

If it is not included in the main wall dimensions, measure it separately.

For example:

Return width × opening height

can be added as another masonry face when appropriate.

Large returns across several openings can add a noticeable number of bricks.

Gables should be split into simple shapes

A wall with a triangular gable should not be calculated as one full rectangle unless the whole rectangle is actually brick.

Separate it into:

Rectangular lower wall

plus:

Triangular gable

For the triangle:

Area = Base × Height ÷ 2

Add the areas before subtracting openings.

This gives a cleaner estimate than using the maximum wall height across the entire elevation.

Stepped walls can also be divided

If the brick height changes along the wall, split the elevation into smaller rectangles.

For example:

Section A: 10 ft × 8 ft

Section B: 6 ft × 5 ft

Calculate both and add them.

This is easier to verify than inventing one average wall height.

Full brick and thin brick are different systems

Thin brick veneer can look like conventional brick but uses a much thinner unit and a different wall assembly.

The visible face may be similar, so the face count can look comparable.

The installation system, however, is different.

Thin brick may use:

• adhesive;
• mortar setting beds;
• panels;
• proprietary systems; or
• different joint details.

Do not assume a face-count calculator also specifies the installation method.

Structural masonry needs more than unit count

A brick wall can be:

• veneer;
• multi-wythe masonry;
• structural masonry;
• cavity wall;
• reinforced masonry; or
• another assembly.

Quantity does not determine whether the wall is structurally adequate.

Design can depend on:

• wall thickness;
• reinforcement;
• foundations;
• lintels;
• ties;
• shelf angles;
• movement joints;
• wind loads; and
• local code requirements.

Use project drawings and applicable masonry guidance for those decisions.

Brick piers should be calculated separately

A brick pier has several faces and may contain solid or hollow interior construction depending on the design.

Do not estimate it only from the front visible width.

Calculate the pier geometry according to the actual assembly.

Likewise, columns and pilasters may use different bonds, special cuts, or reinforcement details.

Arches need their own takeoff

Brick arches can use:

• tapered joints;
• specially shaped units;
• cut bricks;
• voussoirs;
• decorative patterns; or
• structural supports.

A rectangular opening deduction does not tell you how many bricks are required for the arch above it.

Keep arches as separate material and layout items.

Brick dimensions can vary

Two products that appear to be similar bricks may have different actual dimensions.

Differences affect:

• bricks per square foot;
• joint spacing;
• course height;
• cuts; and
• total quantity.

Use the product’s actual technical dimensions whenever possible.

Do not assume every brick sold under a familiar size name has identical measurements.

Brick size and mortar joint determine courses

Suppose the brick face height is:

2.25 in

and the horizontal joint is:

0.375 in

The course module becomes:

2.25 + 0.375 = 2.625 in

That module determines approximately how many brick courses fit into the wall height.

This can help check whether the selected unit and joint create reasonable cuts at the top of the wall.

Course layout can reveal awkward cuts

Before ordering, check the wall height against the brick-and-joint module.

If the elevation ends with a very narrow cut course, the layout may need adjustment.

Possible changes might include:

• modifying joint size within allowed limits;
• adjusting starting elevation;
• coordinating with openings; or
• changing another detail.

The calculator estimates quantity but does not optimize course layout.

Mortar is a separate quantity

Brick count alone is not enough to calculate mortar accurately.

Mortar use depends on:

• brick dimensions;
• joint thickness;
• joint depth;
• frogs or cores;
• workmanship;
• waste;
• wall type; and
• joint profile.

A wall using thin joints can consume very different mortar volume from one with larger joints.

Use a mortar-specific estimate or product guidance when needed.

Wall ties and flashing are not included

A brick veneer installation may also require materials such as:

• wall ties;
• flashing;
• weeps;
• lintels;
• shelf angles;
• sealants;
• membranes;
• reinforcement; and
• movement-joint materials.

These do not scale simply from brick count.

Keep them as separate line items.

Water management matters

Exterior brickwork is part of a wall assembly, not simply a decorative surface.

Flashing, drainage cavities, weeps, sealants, and transitions can be critical to water management.

The Brick Calculator does not determine those details.

Use the specified wall system and construction documents.

Product lot and color range matter

Brick often has natural or intentional color variation.

Production runs can also differ.

If appearance matters, record:

• manufacturer;
• product name;
• plant;
• color;
• texture;
• lot;
• distributor; and
• order date.

Ordering the main quantity together can make color blending easier.

Blend bricks during installation

When the product has a natural color range, installers commonly draw from several cubes or pallets rather than finishing one full pallet before opening the next.

This helps distribute normal variation across the wall.

Check manufacturer recommendations for the specific brick.

The calculator can estimate quantity but cannot control how the color blend appears.

Matching existing brick can be difficult

For an addition or repair, the same catalog name may not produce an invisible match.

Differences can come from:

• age;
• weathering;
• production plant;
• lot;
• clay variation;
• firing;
• mortar color; and
• joint profile.

Compare actual samples in daylight whenever appearance is important.

Keeping spare original bricks can make future repairs easier.

Special shapes may have longer lead times

Projects can require special units for:

• corners;
• sills;
• copings;
• radius walls;
• arches;
• returns; or
• decorative features.

These may not be stocked like ordinary field brick.

Identify them early rather than assuming the main brick quantity can be cut to solve every detail.

Common brick calculation mistakes to avoid

Using floor area instead of wall area

Brick quantity is based on the wall face.

Using brick depth instead of face dimensions

Count the visible length and height.

Ignoring mortar joints

The joint changes the repeating module.

Mixing feet and inches

Convert to compatible units first.

Subtracting every tiny opening

Small penetrations often still create cut waste.

Treating decorative courses as ordinary field brick

Soldiers, rowlocks, and special bonds need separate counts.

Ignoring corners and returns

These can add material and cutting.

Ordering exactly the theoretical count

Allow for appropriate breakage, cuts, and product selection.

Assuming mortar is included

Mortar needs its own estimate.

Before ordering bricks

A useful final review should include:

Wall area

Are all elevations and returns measured?

Openings

Are large doors and windows deducted?

Brick dimensions

Are actual face dimensions being used?

Joint

Does the planned joint match the masonry detail?

Bond

Is the wall using a regular running bond or a more complex pattern?

Special work

Are soldiers, rowlocks, arches, sills, piers, and decorative bands counted separately?

Allowance

Does it reflect cuts, breakage, and selection?

Packaging

How many bricks are supplied per strap, cube, pallet, or package?

Appearance

Are product, color, and lot details confirmed?

Related material calculators

Use the Concrete Calculator when estimating concrete for footings, pads, or other related work.

The Paint Calculator can help estimate coatings for other wall surfaces.

If the project has several large openings, the Door and Window Area Calculator can help calculate the area to deduct.

FAQ

How do I calculate how many bricks I need?

Calculate the net wall area, determine the face area of one brick-and-joint module, then divide:

Base bricks = Net wall area ÷ Module area

Round upward and add a project-appropriate allowance.

Does mortar-joint size affect brick count?

Yes.

A larger joint increases the repeating module and can slightly reduce the number of bricks per square foot.

Should I subtract windows and doors?

Deduct substantial openings that do not contain brickwork.

Then account separately for cuts, jambs, sills, returns, and special detailing.

Should I use the full brick dimensions?

For a wall-face quantity, use the visible face length and height plus the planned joint.

Brick depth is relevant to the wall assembly but not the simple face count.

Does the calculator include waste?

Only when an allowance is selected or entered.

Use an amount appropriate to the bond, cuts, product, and project complexity.

Does the calculator estimate mortar?

Not reliably from face count alone.

Mortar quantity depends on unit geometry, joints, wall construction, and workmanship.

Can I use the calculator for thin brick?

It can estimate a face quantity when the correct unit dimensions are entered, but thin-brick installation systems and material requirements are different from conventional masonry.

Can I combine several walls?

Yes, when they use the same brick and layout assumptions.

Calculate each wall area, add them, then deduct applicable openings.

Why should I buy extra matching brick?

Future production lots may differ in color or dimensions, and some products may later be discontinued.

Spare matching units can make future repairs easier.

Does the calculator design the wall?

No.

It estimates brick quantity only. Structural design, reinforcement, foundations, lintels, flashing, ties, movement joints, and water management require project-specific guidance.

Masonry reference

For technical information covering brick masonry design, detailing, construction, materials, and performance, see:

Brick Industry Association — Technical Notes

Project drawings, applicable building codes, manufacturer information, and qualified masonry guidance should control the actual wall assembly.

Count the wall face, then review the masonry details

A Brick Calculator can turn a wall elevation into a useful base quantity.

The final order depends on more than square footage.

Openings create cuts. Corners interrupt the bond. Soldier courses use bricks differently. Piers, arches, returns, and decorative details add their own quantities. Product lots can affect appearance.

Start with the net wall face and the actual brick-and-joint module.

Then review the bond and special details before adding allowance and converting the result into the supplier’s real packaging.

That produces a much more practical brick order than relying on wall area alone.