160
sq ft
0.1527
sq ft
6.55
bricks/sq ft
1,153
bricks
7
bags
160
sq ft
0.1527
sq ft
6.55
bricks/sq ft
1,153
bricks
7
bags
The Brick Calculator provides accurate estimates for the number of bricks and mortar bags required for any masonry wall, garden wall, or decorative brick project. Whether you are building a garden feature wall, a retaining wall, or laying a brick path, accurate material estimates prevent costly shortages and reduce waste from over-purchasing.
Standard US modular bricks measure 8" × 3-5/8" × 2-1/4" (length × width × height), and are typically laid with a 3/8 inch mortar joint. This means the effective face dimension of each brick course (brick + mortar) is 8.375" × 2.625". At this size, approximately 6.86 standard bricks cover one square foot of wall face — commonly rounded to 7 bricks per square foot.
This calculator uses your actual brick and mortar dimensions for precision, then applies a 10% waste factor to account for cuts, breakage, and irregular wall edges. For complex decorative patterns (herringbone, soldier courses, basket weave), increase the waste factor to 15-20%.
For mortar, this calculator estimates one 60-lb bag per 25 square feet of wall face at standard 3/8" joints — a widely used rule of thumb for standard running bond brick patterns. Actual mortar consumption depends on joint size, brick texture, and laying technique.
Wall Area: $$\text{Wall Area} = \text{Length} \times \text{Height} \text{ (sq ft)}$$
Area Per Brick (including mortar joint): $$\text{Brick Area} = \left(\frac{\text{Brick Length} + \text{Mortar}}{12}\right) \times \left(\frac{\text{Brick Height} + \text{Mortar}}{12}\right)$$
Bricks Needed (with 10% waste): $$\text{Bricks} = \left\lceil \frac{\text{Wall Area}}{\text{Brick Area}} \times 1.10 \right\rceil$$
Mortar Bags (60 lb, 25 sq ft/bag): $$\text{Bags} = \left\lceil \frac{\text{Wall Area}}{25} \right\rceil$$
For a 20 ft × 8 ft wall with standard bricks and 3/8" mortar: Area = 160 sq ft; Brick area = (8.375/12) × (2.625/12) = 0.1524 sq ft; Bricks = ⌈160/0.1524 × 1.10⌉ = 1,154; Mortar bags = ⌈160/25⌉ = 7 bags.
Order bricks from the same kiln run or batch to ensure consistent color and texture — color variation between batches is common with natural clay bricks. Purchase all bricks at once if possible, as returning unused bricks often carries a restocking fee. Mortar should be mixed to a peanut butter consistency and used within 1-2 hours of mixing. Always wet-cure brick walls for at least 3 days by keeping mortar moist to maximize strength.
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A 12×4 ft garden wall requires 347 standard bricks and 2 mortar bags. This is a manageable weekend DIY project for an experienced builder.
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A 50 ft boundary wall at 6 ft tall needs 2,169 bricks and 12 mortar bags. Consider delivery costs when ordering this quantity.
A standard pallet typically holds 500-510 standard modular bricks. Some suppliers offer half-pallets of 250. For large projects, ordering by the pallet is more economical and easier to transport than buying individually. Confirm pallet quantities with your specific supplier, as they vary by brick size and manufacturer.
Modular bricks (3-5/8" × 2-1/4" × 7-5/8") include a 3/8" mortar joint in their dimensional module, meaning they fit precisely within a standard grid. Standard bricks (same size) are the most common type in North America. Other sizes include Queen (3" × 2-3/4" × 9-5/8") and King (3" × 3" × 9-5/8"). Always enter your actual brick dimensions for accurate calculations.
Professional brick wall installation typically costs $10-$45 per square foot including materials and labor. DIY costs (materials only) run $3-$10 per square foot depending on brick type. Decorative or specialty bricks (tumbled, hand-made, reclaimed) can cost significantly more than standard clay bricks.
Freestanding garden walls under 3-4 feet typically do not require reinforcement. Walls over 4 feet, retaining walls (holding back soil), or walls in seismic zones should include rebar and concrete core filling (grouted masonry) for structural integrity. Always check local building codes — many jurisdictions require permits and engineering review for walls over 3 feet.
The most common mortar type for general brick construction is Type S (medium-high strength), suitable for outdoor walls, patios, and below-grade applications. Type N (medium strength) is appropriate for above-grade exterior walls not subject to severe weather. Type S is generally recommended for most DIY outdoor projects for its durability and flexibility.
Sealing is optional but beneficial. A penetrating masonry sealer (silicone or siloxane-based) reduces water infiltration, prevents efflorescence (white salt deposits), and extends the wall's life in wet climates. Apply sealer after the mortar has fully cured (28 days minimum). Avoid film-forming sealers on exterior brick as they can trap moisture and cause spalling.
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