Brick Calculator
Estimate bricks required, wall area, mortar allowance, and optional brick material cost for single or double wythe walls. Enter metric or imperial dimensions and review an interactive 3D masonry wall visualization before you order materials.
Transparent Masonry Calculation Breakdown
25 ft × 8 ft
= 200 sq ft gross surface
6.86 bricks per sq ft
Accounting for ⅜" horizontal bed and vertical head joints.
1,371 base × 1.08
= 1,481 bricks + 12 Type N bags.
This brick calculator estimates how many bricks you need for a wall from wall length, wall height, brick dimensions, mortar joint thickness, wythe count, and waste allowance. Wall dimensions and allowances are entered directly, while brick dimensions and joint thickness are loaded from the brick preset you choose. From those values it reports wall face area, a mortar allowance for planning, and an optional brick material cost, alongside an interactive 3D masonry wall visualization. Metric and imperial dimensions are supported throughout, and every result updates as you change an input.
How Many Bricks Do I Need for a Wall?
A brick takeoff for a wall follows the same five steps whether you work them out by hand or use the calculator above:
- Calculate the wall face area by multiplying wall length by wall height.
- Determine the effective brick face area by adding mortar joint thickness to the brick length and brick height, then multiplying the two results.
- Divide the wall area by the effective brick face area to get the base brick quantity.
- Multiply for additional wythes — a double-wythe wall needs twice the bricks of a single-wythe wall with the same face area.
- Add a waste allowance for cuts, breakage, and handling to reach the number of bricks to order.
How to Calculate Bricks for a Wall
The formulas below are the same ones this calculator runs. They produce a planning estimate from the dimensions you enter, using the wall face area, effective brick area, base bricks, waste bricks, and total bricks terminology shown in the calculation breakdown.
Step 1: Calculate Wall Area
wall face area = wall length × wall height
example: 20 ft × 8 ft = 160 sq ft (metric: m × m = m²)
Step 2: Account for Brick Dimensions and Mortar Joints
effective brick length = brick length + mortar joint thickness
effective brick height = brick height + mortar joint thickness
effective brick area = effective brick length × effective brick height
bricks per unit area = 1 ÷ effective brick area
A modular brick (7⅝ in × 2¼ in) laid with a ⅜ in joint covers an effective face of 8 in × 2⅝ in, which is about 6.86 bricks per square foot. In metric units the modular preset (194 mm × 57 mm) with a 10 mm joint covers 204 mm × 67 mm, or roughly 70 bricks per square metre.
Step 3: Calculate Base Brick Quantity
single-wythe bricks = wall face area × bricks per square foot (rounded)
base bricks = single-wythe bricks × number of wythes
Step 4: Add Waste Allowance
waste bricks = base bricks × waste percentage, rounded up
total bricks = base bricks + waste bricks
Brick Calculator Worked Example
Illustrative example only — it shows how one set of inputs flows through the calculation above. Your own result depends on your dimensions, joint thickness, wythe count, and waste allowance, so treat it as a planning estimate rather than a fixed answer for every wall.
- Wall length: 20 ft · Wall height: 8 ft
- Brick: standard modular · Mortar joint: ⅜ in
Wall area: 20 × 8 = 160 sq ft
Effective brick face: 8 in × 2⅝ in
Bricks per square foot: approximately 6.86
Base brick quantity: approximately 1,097 bricks
10% waste: approximately 110 bricks
Total: approximately 1,207 bricks
Mortar (planning assumption): 10 × 80 lb Type N bags
Rounding the rate to 6.86 bricks per square foot first gives roughly 1,098 base bricks — a single brick difference from the unrounded rate this calculator uses.
How Much Mortar Do I Need?
The calculator converts your total brick count into 80 lb bags of pre-mixed Type N mortar using a planning assumption of approximately 130 modular bricks per bag, and shows the approximate dry mix volume alongside the bag count. This is a planning assumption used by this tool, not a universal construction standard.
Actual mortar requirements vary with brick dimensions, joint thickness, wall construction, workmanship, and product yield. The mortar quantity displayed here is an estimate for planning purposes, so confirm coverage on the product you intend to buy and keep a margin on hand for site conditions.
Single Wythe vs. Double Wythe
A single wythe is one layer (also called a leaf or skin) of brick — the thickness of a single course laid face to face. A double wythe is two layers of brick placed together, so two leaves are built for every square foot of wall face.
The calculator multiplies the base brick quantity by the selected wythe count, so choosing two wythes roughly doubles the bricks and the mortar estimate for the same wall area. Select the option that matches the wall you are planning; the tool reports material quantities only and does not evaluate whether a particular wall is structurally adequate or code-compliant.
Brick Sizes and Mortar Joints
The calculator offers three brick presets — Modular, Queen, and King. Each preset loads a matching brick length and brick height plus a default mortar joint thickness, in metric (mm) or imperial (in) units depending on the unit control, so switching presets changes the effective brick face and the resulting brick count.
Mortar joint thickness is part of the effective brick face, so it directly affects the estimated brick quantity. A thicker joint increases the area each brick covers and lowers the count per unit of wall; a thinner joint does the opposite. The joint thickness in use is shown beneath the 3D wall and in the calculation breakdown, together with the bricks per unit area it produces.
Brick Bond Considerations
The pattern bricks are laid in is called the bond. Common examples include stretcher bond (every course runs with stretchers and half-bond offsets), English bond (alternating courses of stretchers and headers), and Flemish bond (stretchers and headers alternating within each course).
Bond and layout can affect cuts, detailing, and material usage at corners, openings, and coursing changes. This calculator estimates quantity primarily from wall dimensions, brick dimensions, mortar joint thickness, and wythe count, plus the waste allowance you select — it does not model a specific bond pattern, and no bond selector has been added to the tool.
Frequently Asked Questions
How many bricks do I need for a wall?
Enter your wall length and wall height, choose a brick preset (which sets brick size and mortar joint thickness), then pick a wythe count and a waste allowance. The calculator multiplies the wall face area by the effective brick area per unit to produce a base brick quantity, then adds your waste allowance for a planning estimate.
How many bricks are needed per square foot?
With the default modular brick (7 5/8 in by 2 1/4 in) laid in a 3/8 in mortar joint, the calculator uses approximately 6.86 bricks per square foot of single-wythe wall. In metric units the default is a 194 mm by 57 mm brick with a 10 mm joint.
How do I calculate bricks for a wall?
Calculate the wall face area, determine the effective brick face area including the mortar joint, divide wall area by effective brick area to get the base brick quantity, multiply by the number of wythes, then add a waste allowance.
How much mortar do I need for brickwork?
The calculator uses a planning assumption of approximately 130 modular bricks per 80 lb bag of Type N mortar and reports the bag count plus the approximate dry mix volume. Actual mortar requirements vary with brick dimensions, joint thickness, wall construction, workmanship, and product yield.
How much waste should I add when ordering bricks?
Waste depends on wall size, bond pattern, cutting, and breakage. The calculator offers 5%, 8%, 10%, and 15% presets so you can pick an allowance that suits your project, and shows the waste bricks it adds to the base quantity.
What is the difference between single-wythe and double-wythe walls?
A single wythe is one layer (leaf) of brick, while a double wythe is two layers. The calculator multiplies the base brick quantity by the selected wythe count, so a double-wythe wall of the same face area needs roughly twice the bricks.
What brick sizes does this calculator support?
Three brick presets: Modular, Queen, and King. Each preset loads a matching brick length, brick height, and default mortar joint thickness, and the preset button shows the dimensions it uses. Wall length and wall height are entered directly, in metric or imperial units.
Can I calculate bricks using metric dimensions?
Yes. Switch the unit control to Metric (m / mm) to enter wall length and height in metres. The brick presets and mortar joint then use millimetre dimensions, such as a 194 mm by 57 mm modular brick with a 10 mm joint, and wall area is reported in square metres.