Wall Dimensions

Enter wall size, choose your material type, and set a waste factor.

ft
ft

Material Type

10%
0%5%10%15%20%
Total Bricks Needed
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bricks
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Type N Mortar Bags (70lb)
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bags
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Masonry Sand
-
tons
Wall area: -
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Material: -
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Waste: -
Key Terms Explained
Essential masonry vocabulary for planning your brick or block project.
CMU (Concrete Masonry Unit)
The formal name for a concrete block. Standard CMUs measure 8 x 8 x 16 inches nominally and are the most common material for structural walls, foundations, and retaining walls.
Nominal vs. Actual Size
The nominal dimension includes the mortar joint (typically 3/8 inch) added to each face. A brick's actual size is 3-5/8 x 2-1/4 x 7-5/8 in; its nominal size is 4 x 2-2/3 x 8 in. Calculators use nominal sizes.
Mortar Joint
The layer of mortar between masonry units. The industry standard thickness is 3/8 inch (about 10 mm). Joint thickness affects the unit count: thicker joints mean fewer bricks per course.
Type N Mortar
A general-purpose mortar mix (1 part cement, 1 part lime, 6 parts sand) suited for above-grade exterior brick veneer, chimneys, and soft stone. Medium strength, good workability, and weather resistance.
Type S Mortar
A stronger mortar (1 part cement, 0.5 parts lime, 4.5 parts sand) used for below-grade masonry, retaining walls, and structural block (CMU) work where higher compressive strength is required.
Masonry Sand
A coarse, washed sand screened to a specific gradation for mixing mortar. Also called builder's sand. Its angular particle shape creates mechanical bond strength that fine play sand cannot provide.
Waste Factor
An overage percentage added to account for cuts, broken units, mis-measured pieces, and minor layout errors. A 10% waste factor is standard for simple rectangular walls; 15-20% for walls with many openings or complex patterns.
Running Bond
The most common brick laying pattern, where each brick's vertical joints are offset by half a brick length from the courses above and below. It creates a strong, interlocking structure and is the default pattern assumed by brick-per-square-foot calculations.

The Complete Guide to Estimating Brick and Block for a Wall

Whether you're building a garden wall, a retaining wall, or the exterior shell of a structure, getting your material quantities right before ordering saves money, prevents project delays, and eliminates the frustration of mid-job supply runs. This guide explains exactly how this calculator works, the math behind every figure, and how to translate the numbers into a real supplier order.

How to Use This Calculator

Enter your wall's finished length and height. The calculator assumes a single-wythe (one unit deep) wall. Select your material - Standard Modular Brick or Standard Concrete Block (CMU). Adjust the waste factor slider: 10% covers a simple rectangular wall, while 15-20% is better for walls with windows, doors, curves, or diagonal patterns. All results update instantly as you type.

The outputs are conservative estimates. The hero number shows total units including waste. The two cards below it show mortar bags and masonry sand. Round your supplier order up to the nearest full pallet to account for delivery minimums and to have a few spares on site.

The Math: How Unit Counts Are Calculated

The foundation of every masonry estimate is the wall's surface area in square feet. Multiply length by height, then multiply by the unit yield - how many bricks or blocks cover one square foot of wall face.

Material Nominal Face Size Units per Sq Ft Joint Assumed
Standard Modular Brick 4 x 2.66 in (nominal) 6.75 3/8 in
Standard CMU Block 8 x 16 in (nominal) 1.125 3/8 in

After calculating base units, the waste factor is applied: Total Units = Base Units x (1 + Waste%). Mortar and sand quantities are then derived from the total unit count using industry-standard multipliers.

Mortar and Sand: Industry Multipliers Explained

Mortar bag and sand estimates are based on widely published masonry trade ratios. For brick: roughly 1 bag of premixed mortar per 143 bricks (0.007 bags per brick), and 0.001 tons of sand per brick. For CMU: roughly 1 bag per 33 blocks (0.03 bags per block), and 0.01 tons of sand per block. Blocks consume far more mortar per unit because their face shells and web are much larger and all joints are filled.

These ratios assume standard 70-pound bags of Type N (brick) or Type S/N (block) premixed mortar. If you mix your own from Portland cement, lime, and sand, adjust accordingly - a standard field mix ratio is 1 part cement, 1 part lime, and 6 parts sand by volume.

Pallet Quantities: Planning Your Supplier Order

Standard modular bricks typically ship 500 to 525 per pallet. Standard 8x8x16 CMU blocks ship approximately 90 per pallet. Most suppliers have minimum order sizes and may charge delivery fees per pallet, so plan your total slightly above the calculated quantity to land on an even pallet count. Check your local supplier's exact pallet count before ordering.

Frequently Asked Questions

The actual size of a standard modular brick is 3-5/8 inches wide by 2-1/4 inches tall by 7-5/8 inches long. The nominal size (roughly 4 x 2.66 x 8 in) adds a 3/8-inch mortar joint to each face dimension. Calculators use nominal sizes because the mortar joint is already built in, making the math simpler and more accurate for estimating quantities.
Masonry sand (also called builder's sand) is washed and screened to a specific coarse gradation that bonds tightly with Portland cement and lime. Play sand and pool sand are too fine and too round - they produce a weak, crumbly mortar that lacks the compressive strength and workability needed for structural brick or block work. Always use masonry sand for mortar.
The standard mortar joint for both brick and concrete block (CMU) work is 3/8 inch (about 10 mm). This thickness is already factored into the nominal brick and block dimensions used by this calculator, so the unit counts it produces are accurate for typical construction using standard tooled joints.
Standard modular bricks typically ship 500 to 525 per pallet. Standard 8x8x16 inch concrete masonry units (CMU blocks) typically ship 90 blocks per pallet. Check with your local supplier as counts can vary slightly by manufacturer and region.
Most professional masons use a 10% waste factor for straightforward rectangular walls with few cuts. Increase to 15 to 20% for walls with many openings (windows, doors), corners, curved sections, or diagonal patterns like herringbone. The default 10% in this calculator is appropriate for a basic straight wall.
Estimating Tool Only. Results are approximations based on standard industry yields and mortar multipliers. Actual quantities may vary depending on mortar joint thickness, wall bond pattern, local material sizes, and contractor practices. Always verify final quantities with your masonry supplier before ordering.