The standard brick calculator online gives you a brick count, and that is all. You go to the home improvement store, buy 851 bricks for your 20×6 ft wall, and on the way out the door realize you forgot the mortar. For 851 bricks at one bag per 30, that is 29 bags of 60 lb Type S mortar that you left behind. This is not a small oversight — 29 bags weigh 1,740 pounds and you will need a second trip. Our calculator shows bricks and mortar bags in the same result so you order both materials at once.
The other thing almost every brick calculator misses is the bond pattern. Running bond — every brick a stretcher (long side facing out, stacked so each joint falls at the midpoint of the brick below) — is the standard US residential pattern and the most efficient in terms of cuts. English bond alternates full courses of stretchers with full courses of headers (bricks placed perpendicular to the wall, their short end visible). Flemish bond alternates a stretcher and a header within each course. Both English and Flemish bonds require more cuts, more mortar, and more labor. The waste factor difference is real: running bond needs 5% extra, English bond 8%, Flemish bond 10%. On a 120-sq-ft wall, that difference is 41 extra bricks between running and Flemish bond.
Wall area equals length times height in feet. Standard modular bricks with 3/8-inch mortar joints cover 6.75 bricks per square foot (unit height = 2.625 inches, unit length = 8 inches: 144 sq in / (2.625 x 8) = 6.86, rounded to industry standard 6.75). Brick count = wall area x bricks per sq ft x waste factor (running bond 1.05, English 1.08, Flemish 1.10). Mortar = brick count / 30 (industry standard for face shell bedding, 60 lb Type S). Wall courses = wall height in inches / unit height per course (2.625 in for standard modular). King size bricks yield 5.95 per sq ft. Roman bricks yield 7.36 per sq ft due to their longer 12-inch length.
01
Wet Your Bricks Before Laying — Especially in Summer
Standard clay face brick is porous. A dry brick placed against fresh mortar will immediately draw water out of the mortar mix, preventing the proper hydration reaction from taking place and producing a bond that is weaker than it should be. The standard test is the Initial Rate of Absorption (IRA) — bricks with an IRA above 30 grams of water per minute per 30 square inches (the ASTM C67 test threshold) must be pre-dampened before laying. A practical field test: place a brick face-down in half an inch of water for 60 seconds. If the water is visibly absorbed, the brick needs wetting before use. In hot, dry conditions (common in Texas, the Southwest, and summer months across the South), this is critical even for lower-absorption bricks. Dampen the bricks to a surface-saturated condition — damp but not dripping — immediately before laying.
02
Use a Story Pole to Keep Courses Consistent From Start to Finish
A story pole is a straight board marked at every course height (2.625 inches for standard modular brick with 3/8-inch joints) from the bottom course up to the final course. Before you lay the first brick, cut your story pole to the finished wall height with all the course marks on it. Set the story pole at each end of the wall and at every 8 to 10 feet of length. As you build, check each course against the story pole at multiple points to ensure the mortar joint is consistent. Without a story pole, mortar joints tend to drift — 1/4-inch joints at the bottom become 1/2-inch joints at the top, and the wall ends up both taller than planned and visually inconsistent. The story pole keeps you on track without constant measuring.
03
Protect Fresh Mortar From Rain, Direct Sun, and Freezing Temperatures
Fresh brick mortar is vulnerable for the first 48 to 72 hours of curing. Rain can wash uncured mortar out of joints before the initial set, leaving voids that allow water infiltration. Direct summer sun rapidly dries the mortar surface while the interior remains wet, creating surface cracking. Freezing temperatures stop the hydration reaction entirely and can cause fresh mortar to fail by ice crystal formation. Protect fresh work with polyethylene sheeting or burlap at night and during rain. In hot weather, cover the wall with damp burlap and mist it throughout the day to slow the cure. In cold weather, use Type S mortar with a hot water mix and cover with insulating blankets — never add antifreeze chemicals to mortar, as they degrade long-term bond strength.
How many bricks do I need per square foot?+
Standard modular bricks with 3/8-inch mortar joints require 6.75 bricks per square foot of wall face. This is the industry standard for single-wythe (one brick thick) construction in running bond. The unit dimensions that produce this coverage rate: 2-1/4 inch brick height plus 3/8-inch mortar joint = 2.625-inch unit height; 7-5/8 inch brick length plus 3/8-inch mortar joint = 8.0-inch unit length. Bricks per sq ft = 144 sq in divided by (2.625 x 8.0) = 6.86, rounded to the industry standard of 6.75. Add 5% waste for running bond, 8% for English bond, 10% for Flemish bond.
How much mortar do I need for brick?+
The standard residential masonry rule is 1 bag of 60 lb Type S mortar per 30 bricks using face shell bedding (mortar applied to the outer shells of hollow bricks or the full face of solid bricks). For 851 bricks: 851 divided by 30 = 29 bags. For full mortar bedding, use 1 bag per 20 bricks. Pre-mixed Type S mortar at 60 lb per bag yields approximately 0.45 to 0.50 cubic feet of mixed mortar. Alternatively, site-mixed mortar from Portland cement, hydrated lime, and sand follows the ratio 1 part cement to 0.25 parts lime to 3.75 parts masonry sand by volume for Type S strength.
What is running bond pattern for brick?+
Running bond (also called stretcher bond or common bond) is the pattern where every brick is laid as a stretcher — long side parallel to the wall face — and each vertical joint in one course falls at the midpoint of the brick in the course below. This offset produces the familiar staggered joint pattern seen in most modern US brick construction. Running bond is the strongest, most efficient, and most common masonry pattern for single-wythe brick walls because the offset joints distribute loads horizontally across multiple bricks. It is also the most forgiving pattern for a first-time brick mason because all bricks are oriented the same way and cuts only happen at corners and wall ends.
What is English bond in brickwork?+
English bond alternates complete courses of stretchers (bricks with long side facing out) and headers (bricks with short end facing out, oriented perpendicular to the wall). In a stretcher course, bricks span the width of the wall face. In a header course, bricks run through the wall depth, tying the wall together. English bond creates a stronger structural wall for thick (double-wythe or triple-wythe) construction because the header courses lock the wythes together. It also uses more bricks than running bond because the header courses expose only the 3-3/4 inch end of each brick rather than the 7-5/8 inch face, resulting in more bricks per linear foot of header course. Our calculator uses 8% waste for English bond versus 5% for running bond to account for the additional cuts at corners and openings.
What is Flemish bond in brickwork?+
Flemish bond alternates a stretcher and a header in every course, with header bricks centered above the stretchers in the course below. This creates a distinctive, decorative checkerboard-like appearance that is common in historic US architecture (particularly in Virginia and the Delaware Valley). Flemish bond uses more mortar and more cut bricks than running bond because every header brick must be centered over the stretcher below, which frequently results in fractional cuts at corners and wall ends. Our calculator uses a 10% waste factor for Flemish bond. Genuine Flemish bond on a double-wythe wall uses full bricks as headers that extend through both wythes; on a single-wythe wall, Flemish bond headers are typically half bricks (bats) that are visually consistent with the pattern but do not extend through the wall depth.
What is the standard US brick size?+
The most common US brick standard is the modular brick, with actual dimensions of 2-1/4 inch height by 3-5/8 inch width by 7-5/8 inch length. The nominal dimensions with a 3/8-inch mortar joint are 2-5/8 inch height by 4 inch width by 8 inch length. Other common US sizes include: King size (2-5/8 x 2-3/4 x 9-5/8 inch actual), which yields approximately 5.95 bricks per square foot; Roman brick (1-5/8 x 3-5/8 x 11-5/8 inch actual), a long thin brick that yields approximately 7.36 per square foot; Norman brick (2-1/4 x 3-5/8 x 11-5/8 inch actual); and Closure or Jumbo brick (2-3/4 x 3-5/8 x 7-5/8 inch actual). All of these are single bricks; the width dimension is the wall thickness for single-wythe construction.
What type of mortar do I use for brick walls?+
Type S mortar (ASTM C270) is the correct specification for all exterior brick walls, below-grade masonry, and load-bearing walls. Type S has a 28-day compressive strength of 1,800 psi and adequate bond strength for structural applications in US climates. Type N mortar (750 psi) is acceptable only for above-grade, non-load-bearing interior applications. Type M mortar (2,500 psi) is used for brick in contact with soil, heavy structural walls, and situations where higher strength is specified by an engineer. Pre-mixed Type S mortar bags (Quikrete Mason Mix, SAKRETE Type S, or equivalent) are the most practical choice for residential projects. Never use general-purpose concrete mix or stucco mix as a mortar substitute — they have different adhesion chemistry and will not form a proper brick-mortar bond.
How many bricks per linear foot of wall?+
For a standard modular brick in running bond, each linear foot of wall contains: 12 inches divided by 8-inch unit length = 1.5 bricks per course per linear foot. For a wall height of 6 feet (28 courses): 1.5 x 28 = 42 bricks per linear foot of wall. For a 20-ft wall: 42 x 20 = 840 bricks at the face (before waste). With 5% waste: 840 x 1.05 = 882 bricks. Our calculator uses the area-based formula (sq ft x 6.75) which produces 851 bricks — the small difference is due to rounding conventions in the two calculation approaches. The area method is the industry standard for estimating; the linear foot method is useful for checking cuts at corners and openings.
How many courses of brick equal one foot?+
For standard modular brick with 3/8-inch mortar joints: each course is 2.625 inches tall (2.25-inch brick height plus 0.375-inch mortar joint). One foot (12 inches) divided by 2.625 = 4.57 courses per foot. As a practical planning rule, brick masons say “three courses equal about 8 inches” and “every 8 courses is approximately 21 inches.” A 4-foot wall requires 18 to 19 courses; a 6-foot wall requires 27 to 28 courses; an 8-foot wall requires 36 to 37 courses. For Roman brick (2-inch unit height), one foot equals 6 courses. For king size brick (3-inch unit height), one foot equals 4 courses. Our calculator shows the exact course count for your wall height and brick size.
What is the difference between single and double wythe brick?+
A wythe is a single vertical layer of brick masonry. A single-wythe wall is one brick thick (approximately 3-5/8 inches for modular brick, often called a 4-inch wall when dimensioned to a nominal 4 inches). A double-wythe wall is two bricks thick (approximately 8 inches, a nominal 8-inch wall) with header bricks or metal ties connecting the two wythes together. Single-wythe walls are used for landscape features, garden walls, and non-structural interior dividers. Double-wythe walls are the traditional structural wall for US homes built before World War II and are still used for commercial brick buildings and premium residential construction. Our calculator is designed for single-wythe walls — for double-wythe construction, multiply the calculated brick count by approximately 2.1 to account for the header bricks at the wythes.
How do I estimate bricks for a wall with openings?+
For a wall with doors, windows, or arched openings, calculate the gross wall area first (full length times full height), then subtract the area of each opening. Each door or window area to subtract = opening width times opening height. Then apply the brick count formula to the net wall area. However, openings require extra bricks for the jamb courses (the bricks at each side of the opening that must be cut to maintain the bond pattern) and for any arch brickwork above the opening. Add approximately 8% to the brick count for each rectangular opening and 12 to 15% for each arched or curved opening to account for the additional cuts and waste. Our calculator handles the basic wall area calculation — input your net wall area after subtracting openings, and the waste factor covers standard corner and end cuts.
Do I need a permit for a brick wall?+
Permit requirements for brick walls vary widely by US jurisdiction and depend on wall height, location, and whether the wall is retaining soil or carrying structural loads. Most jurisdictions do not require a permit for decorative garden walls under 3 to 4 feet in height. Structural brick walls (load-bearing walls as part of a building) always require permits, engineering review, and inspections. Brick retaining walls over 4 feet follow the same permit requirements as concrete or block retaining walls. In many US cities and counties, any masonry wall in the front yard setback or adjacent to a public right-of-way requires a permit regardless of height. HOA rules may also restrict brick wall construction by height, color, and pattern. Always verify with your local building department before starting any masonry wall project.
How much does a brick wall cost per square foot?+
For DIY construction using standard modular face brick: brick material runs approximately $0.80 to $2.50 per brick (6.75 bricks per sq ft = $5.40 to $16.88 per sq ft in brick materials alone). Add mortar (about 1 bag per 30 bricks = $12 to $15 per bag, approximately $2.70 to $3.38 per sq ft), plus sand and tooling supplies. Total DIY materials for standard face brick typically run $8 to $22 per sq ft of wall face. For contractor-installed brick, the fully installed cost ranges from $30 to $75 per sq ft in most US markets (2026 estimates) depending on brick cost, pattern complexity, and local labor rates. Flemish bond and English bond patterns add 20 to 30% to the labor cost compared to running bond because of the additional cuts and pattern alignment required.
What is soldier course in brick masonry?+
A soldier course is a course of brick laid vertically (on end) with the long dimension of the brick vertical and the face showing. This is the opposite of the normal horizontal stretcher position. Soldier courses are commonly used as accent bands at specific heights in a wall, as window headers above openings (a rowlock arch of soldiers is a traditional US detail above double-hung windows), and as capstones at the top of a wall. A soldier course typically requires more bricks than the same linear footage in a stretcher course — each brick shows its narrow 2-1/4 inch dimension rather than the 2-5/8 inch mortar-joint-inclusive height, so approximately 5.3 bricks per linear foot versus 1.5 bricks per linear foot for a horizontal stretcher course. Our brick calculator handles standard horizontal courses — add the soldier course brick count separately if your design includes soldier courses.
How do I clean mortar off brick after laying?+
Fresh mortar smears can be removed with a stiff fiber brush and water within the first 30 to 60 minutes before the mortar sets. Once mortar has hardened (typically 24 to 48 hours after placement), it must be removed with diluted muriatic acid: mix 1 part muriatic acid with 10 to 12 parts water (always add acid to water, never water to acid), wet the brick thoroughly with plain water first to prevent acid from soaking into the pores, then apply the diluted acid solution and scrub with a stiff brush. Neutralize with a baking soda and water solution, then rinse thoroughly with clean water. Never use full-strength muriatic acid on brick — it will etch and discolor the brick surface. Newer brick cleaning products like Sure Klean 600 or similar commercial masonry cleaners are safer alternatives that still remove hardened mortar effectively without the hazards of muriatic acid.
How do I cut bricks for corners and openings?+
Bricks can be cut using an angle grinder with a diamond masonry blade (fast, portable, produces some dust), a wet-cutting masonry saw (most precise, generates minimal dust), a brick splitter (guillotine-style tool for straight cuts only, no dust), or a cold chisel and hammer (traditional method, imprecise). For running bond construction, cuts at corners are typically half bricks (bats) that are cut once and used throughout the project. For Flemish or English bond with more complex cut requirements at corners and returns, a wet masonry saw is strongly recommended. All brick cutting generates silica dust — always wear an N95 respirator or P100 half-face mask, eye protection, and work outdoors or with good ventilation. Using water-cutting methods significantly reduces airborne silica.