Brick Wall Planning Guide: Quantity, Mortar Joints, and Waste

Use the free Brick Calculator to turn your measurements and local prices into a project estimate.

A brick estimate depends on the wall area and the installed module—the exposed brick face plus its mortar joint. Using brick dimensions alone can overstate the number of units because it ignores the space occupied by mortar.

Measure the net wall area

Multiply wall length by height. Divide stepped or irregular walls into rectangles and triangles, then add their areas. Subtract large doors, windows, and other areas that will not receive brick.

Confirm brick orientation

Use the face that will be visible in the wall. Standard, modular, queen, utility, and thin-brick products have different dimensions. Soldier courses, rowlock caps, arches, and accent bands also change how units are oriented and counted.

Include the mortar joint

Add the planned horizontal joint to brick length and the vertical joint to brick height. Multiply those module dimensions and convert square inches to square feet. Divide wall area by module area to estimate the basic quantity.

Add waste and matching stock

Waste covers cuts, breakage, damaged units, and layout adjustments. Complex corners, arches, patterns, or fragile reclaimed brick may need a larger allowance. Keeping matching units for future repairs is useful because color can vary between production runs.

Budget beyond the brick

• Mortar or approved adhesive for thin-brick systems
• Flashing, weeps, drainage space, and weather barrier details
• Ties, reinforcement, lintels, and movement joints
• Delivery, access equipment, cutting, cleanup, and disposal

Masonry can carry significant loads and must manage water correctly. Follow approved plans, product instructions, and local requirements.

Use the estimate as a planning range

Measure twice, use exact product dimensions or package coverage, and compare the result with supplier or contractor information. Taxes, delivery minimums, labor, tools, site conditions, and local requirements can change the final cost.

Worked brick-count example

Assume a wall is 20 feet long and 8 feet high. Its gross face area is 160 square feet. Subtracting one 3-foot by 7-foot opening leaves 139 square feet of brick face.

For an example brick-and-joint module measuring 8 inches long by 2.625 inches high, one visible module covers 21 square inches, or about 0.1458 square foot. Dividing 139 by 0.1458 gives approximately 954 bricks. A 7% allowance for cuts and breakage raises the purchasing estimate to about 1,021 bricks. This example is not a universal bricks-per-square-foot rule; the exact brick face and planned mortar joint control the count.

Verify the masonry layout

• Measure gross wall area and subtract only openings the estimator or supplier recommends subtracting.
• Use the actual face length and height of the selected brick plus the planned joint.
• Separate corners, returns, piers, arches, sills, and special shapes.
• Confirm bond pattern because some layouts create more cuts or units.
• Keep color lots together and include an appropriate quantity for future repairs.
• Price mortar, reinforcement, flashing, weeps, lintels, delivery, equipment, and labor separately.

Quantity is not wall design

The calculator estimates visible units and material cost. It does not design foundations, structural masonry, veneer ties, lintels, movement joints, drainage, flashing, or reinforcement. Follow approved plans, manufacturer instructions, and locally adopted requirements.

Review notes

This guide was reviewed on September 21, 2026. The calculation uses net wall area divided by the installed brick-and-joint module. Read how our calculators work for units, rounding, waste, and price assumptions.

Open the Brick Calculator