Brick Calculator
Estimate complete bricks for a straight wall after door and window openings, unit rate and waste.
Free · No signup · Reviewed August 22, 2026Use the finished area you plan to cover, then refine the assumptions below.

Why it mattersSee gross wall face, opening deductions and net masonry area.
Reference image; figures update from your measurements.You’ll need
936 complete bricksProject shopping list
Use your result as a starting point, then confirm package coverage, product instructions and local requirements before purchasing.
How the calculation works
net wall area × bricks per area × (1 + waste)
Enter each project area, choose the measurement system, then adjust waste and real package coverage. Packaged materials round up so the shopping list never suggests part of a box, sheet or panel.
How to use the brick calculator
Measure straight wall length and height, deduct doors and large windows, enter the brick rate for the selected unit and joint, then apply cutting waste. ProjectMeter rounds the result up to complete bricks and shows net wall area.
Formula and guidance reviewed August 22, 2026. Always confirm the final order with product instructions and project requirements.What to measure
- 01
Measure each wall face
Record finished wall length and vertical height. Add returns, gables, piers and walls with different heights as separate entries rather than hiding them inside one average rectangle.
- 02
Count major openings
Enter standard doors and large windows so their planning areas are removed. Lintels, sills, jamb cuts and special brick around openings still need a masonry layout.
- 03
Confirm bricks per area
Brick dimensions and mortar joints determine unit rate. Use the manufacturer's or supplier's stated bricks per square foot or square metre for the exact size and bond where available.
- 04
Add bond and cutting allowance
Corners, returns, bond pattern, damaged units and cuts create waste. Adjust the allowance to the real elevation and keep special shapes separate from standard field brick.
20 × 8 ft wall with one door and one window
- 160 sq ft gross wall
- 36 sq ft standard opening deduction
- 6.86 modular bricks per sq ft
- 10% cutting allowance
Net wall area is 124 sq ft. Applying the modular unit rate and 10% allowance produces 935.7 bricks, so the shopping list rounds up to 936 complete bricks.
Try your own measurements ↑Compare the complete project cost
Your material quantity is only one part of a quote. Preparation, removal, access, finishing and local labour can change the installed total.
Planning guides for this calculator
Use the live model for feedback, then use these guides to verify the dimensions and material assumptions behind the result.
Interactive project checklists
Use the pre-order list before material arrives, then save the inspection and maintenance list for closeout and future care.
Brick calculator FAQ
How many modular bricks are in one square foot?
A common modular face is 7 5/8 by 2 1/4 inches. With a nominal mortar joint, the planning rate is roughly 6.86 bricks per square foot, but use the exact supplier rate for the selected product and bond.
Should doors and windows be deducted?
Large openings can be deducted for field-brick quantity. Their edges still require cuts, lintels, sills or special units, so retain a suitable waste allowance and use the approved wall elevation.
Does the calculator include mortar?
No. Mortar quantity changes with brick depth, joint profile, bed thickness, workmanship and waste. Obtain a material-specific estimate from the masonry specification or supplier.
Plan accurately. Build safely.
This calculator is a planning estimate, not engineering or code approval. Follow manufacturer instructions and consult a qualified professional for structural, electrical, gas or permit-sensitive work.


