Bricks Calculator: Estimate How Many Bricks You Need
Planning a brick wall, patio, or retaining wall? Estimating the number of bricks you need is the first step in any masonry project. Order too few and you risk delays and color mismatches from different batches. Order too many and you waste money. Our Bricks Calculator estimates the number of bricks, mortar volume, and total cost based on your wall dimensions, brick size, and mortar joint thickness. Use our Bricks Calculator to estimate your costs.
How Brick Calculations Work
The number of bricks needed depends on the wall area, brick size, and mortar joint thickness. Standard US bricks measure 7.5 × 3.5 × 2.25 inches, but sizes vary by region and application. A standard mortar joint is 3/8 inch thick. The formula accounts for the brick dimensions plus the mortar joint to determine how many bricks fit per square foot.
Typically, a standard brick wall uses about 7 bricks per square foot (for a single-layer wall). A double-layer (structural) wall uses about 14 bricks per square foot. Always add 5-10% for waste, breakage, and cuts.
Using the Bricks Calculator
Enter the wall length and height, select your brick size (or enter custom dimensions), and specify the mortar joint thickness. The calculator shows the number of bricks needed, the wall area in square feet, the mortar volume in cubic feet, and the estimated cost based on local brick prices.
The calculator supports different wall types: single brick (4-inch wall), double brick (8-inch wall), and veneer (brick facing over another structure). It also handles openings — subtract windows and doors from the total area for more accurate estimates.
Brick Types and Sizes
Standard Modular Brick
3.5 × 2.25 × 7.5 inches. Most common in the US. Requires about 7 bricks per square foot. Used for houses, small buildings, and retaining walls.
Jumbo Brick
Larger than modular, typically 4 × 3 × 8 inches. Fewer bricks per square foot means faster installation. Used for larger commercial and industrial projects.
Thin Brick / Brick Veneer
Thinner (about 1 inch deep) used as a decorative facing. Applied to existing walls or sheathing. Lighter weight and requires less structural support.
Pavers
Used for walkways, patios, and driveways. Typically 4 × 8 inches and 2-3 inches thick. Different shapes (herringbone, basket weave) affect the number needed.
Mortar Estimation
Mortar is a mixture of cement, sand, and water used to bond bricks together. A typical brick wall uses about 1 cubic foot of mortar for every 100 bricks. Mortar also fills the vertical head joints and horizontal bed joints.
The calculator estimates both the mortar volume and the materials needed: cement (usually Type N or Type S for above-grade walls), sand, and optionally lime. A standard mortar mix ratio is 1 part cement to 3-4 parts sand.
Tips for Ordering Bricks
- Add 10% waste: Order 10% more bricks than the calculated amount to account for breakage, cuts, and future repairs
- Buy from one batch: Bricks from different manufacturing batches can have subtle color variations. Order all bricks at once from the same batch.
- Consider pallet sizes: Bricks are typically sold by the pallet (400-500 bricks depending on size). Calculate how many pallets you need.
- Order extra for repairs: Keep 20-30 extra bricks stored for future repairs or additions to match existing brick perfectly.
- Include brick returns: Corners and edges require cut bricks. A brick return (corner) needs about 50% more bricks per linear foot.
Real-World Example
A 20-foot long, 6-foot tall single-brick wall using standard modular bricks (7.5 × 3.5 × 2.25 inches) with 3/8-inch mortar joints:
- Wall area: 20 × 6 = 120 square feet
- Bricks per square foot: ~7
- Total bricks: 120 × 7 = 840 bricks
- Add 10% waste: 840 × 1.10 = 924 bricks
- Mortar needed: 840 / 100 = 8.4 cubic feet
- Bags of mortar mix: Approximately 16-18 bags (60-lb bags cover about 0.5 cubic ft each)
- Estimated cost at $0.50/brick: 924 × $0.50 = $462 plus mortar
Worked Example: Tracing the Calculator's Math
Run the default scenario: a wall 20 feet long and 8 feet high, standard UK bricks (215 × 102.5 × 65 mm), a 10 mm mortar joint, and $0.50 per brick. The tool first converts the brick and mortar dimensions from millimetres to feet, then adds the mortar joint to both the brick length and height to find the true footprint of each brick when laid — roughly 0.738 ft wide and 0.246 ft tall including the joint.
Dividing 1 by that footprint gives 5.50 bricks per square foot, which the tool reports directly. It multiplies by the wall area of 160 sq ft (20 × 8) to get 880.7, then rounds up to 881 whole bricks. That rounding-up step matters for ordering: the tool always rounds to a full brick so you never order a fractional count. The cost tile then multiplies 881 by the $0.50 price to report $440.50.
The mortar figure comes from the difference between the wall's solid volume and the combined volume of all 881 bricks. The tool computes the wall volume as the face area multiplied by the brick's width dimension, subtracts the total brick volume, and reports approximately 9.25 cubic feet of mortar. Since one 80 lb bag of pre-mixed mortar covers roughly 0.6 cubic feet, that figure translates to about 15–16 bags — a helpful planning number the calculator gives you before you visit the supplier. Add 5–10% for breakage and cutting, which brings the order to roughly 930–970 bricks.
Start Calculating
Use our Bricks Calculator below to estimate your masonry project accurately. Also check our Concrete Calculator for concrete estimates and our Square Footage Calculator for area measurements.
Related Calculators
Use our Bricks Calculator Guide together with related tools such as Bricks Calculator, BTU Calculator, Concrete Calculator 0967371417 to plan more accurately. Each calculator runs instantly in your browser with step-by-step guidance.
Written by the CalcMaster Pro Editorial Team — financial, health, and DIY tools reviewed for accuracy. All calculators run on standard, widely accepted formulas. Always confirm final numbers with a qualified professional for decisions that require official figures.