Masonry calculator

Brick Calculator

Estimate modular brick count from net wall area, brick size, joints, and waste. Switch between US customary and metric units, adjust the assumptions, and keep every step visible.

01 Measure02 Allow03 Order

Project inputs

Use one unit system throughout. Defaults show a realistic example; replace them with measurements from your project.

Unit system

Wall lengthExample input — replace with your project value.ftWall heightExample input — replace with your project value.ftDoors and windowsExample input — replace with your project value.ft²Brick lengthPlanning default — verify the selected product or project specification.inBrick heightPlanning default — verify the selected product or project specification.inMortar jointPlanning default — verify the selected product or project specification.inWaste allowanceEditable planning allowance for cuts, breakage, compaction, or site loss.%Price per brickOptional local price; enter zero to hide the cost estimate.currencyCurrencyPlanning default — verify the selected product or project specification.

Measure the finished shape. Brick module size includes one mortar joint. Verify the selected brick size, bond pattern, openings, and special units.

Estimate matches the inputs shown.

ReviewedNovember 2, 2026

ByBuildGauge Editorial Team

ScopeFormula, defaults & sources

Report an issue ↗

The calculation

A visible formula, not a black box.

Bricks & cost · Mathematical derivationbricks = net wall area ÷ brick module area × waste factor

Inputs are converted to a common base unit before calculation. Purchase quantities are rounded only at the final buying boundary.

Example inputDefaultStatus

Wall length20 ftPlanning default — verify

Wall height8 ftPlanning default — verify

Doors and windows20 ft²Planning default — verify

Brick length8 inPlanning default — verify

Brick height2.25 inPlanning default — verify

Mortar joint0.375 inPlanning default — verify

Waste allowance7 %Planning default — verify

Price per brick0.85 currencyPlanning default — verify

CurrencyUSD Planning default — verify

Worked example

Example: planning brick

Using the editable example inputs—wall length 20 ft, wall height 8 ft, doors and windows 20 ft²—the calculator returns 982 bricks. Replace every example with measured dimensions and the selected product label before purchase.

Use this to understand the workflow—not as a recommendation for your project.

Sources & scope

What supports this calculation.

Industry guidanceQUIKRETE mortar and masonry calculator ↗

Supports the product rule or estimating basis used by the Brick Calculator; geometry and unit conversion remain visibly derived in the calculator.

Mathematical derivationNIST SI conversion factors ↗

Exact length, area, and volume unit conversions; the project formula is derived from standard geometry.

Common mistakes

Check the job, not just the number.

01Leaving the example brick inputs unchanged instead of entering measured project values.
02Treating an editable coverage, size, density, or allowance as universal instead of checking the selected product label, project documents, and local requirements.
03Ordering from the rounded result without reviewing exclusions: Brick module size includes one mortar joint. Verify the selected brick size, bond pattern, openings, and special units.

Questions, answered

Brick FAQ

What does the Brick Calculator estimate?

Estimate modular brick count from net wall area, brick size, joints, and waste. The primary output is bricks & cost, with the intermediate assumptions kept visible.

How is the brick result calculated?

The visible formula is: bricks = net wall area ÷ brick module area × waste factor. Inputs are converted to a common base unit before the final purchase boundary is rounded.

Are the default values recommendations?

No. Dimensions are worked examples and product-dependent presets are planning defaults. Replace them with the selected product label, project documents, and local requirements.

Is the result ready to order from?

Use it as a checked planning estimate, then confirm packaging, minimum orders, installation instructions, site conditions, and any code or professional-design requirements.