Brick Wall Calculator
Estimate how many bricks and how much mortar to buy for a wall before you order. Enter the wall size, openings, brick dimensions, joint thickness, wall thickness assumption, and waste to get a purchase-ready planning estimate.
How It Works
Formula
Variables, symbols and units
- Wall length(m)
- Wall height(m)
- Gross wall area before openings(m²)
- Opening area removed from the wall face(m²)
- Net wall area left to build(m²)
- Brick length(m)
- Brick height(m)
- Assumed wall depth(m)
- Volume of one brick(m³)
- Mortar joint thickness(m)
- Effective brick face area including one joint each way(m²)
- Single-skin brick count before rounding(bricks)
- Wall-thickness factor (1, 2, or custom)(×)
- Required bricks before waste(bricks)
- Mortar volume estimate after waste(m³)
- Waste allowance(%)
Calculation method explained
Enter the wall length and height, then choose how to subtract openings. The calculator removes opening area from the gross wall face, builds an effective brick module from brick length + one joint and brick height + one joint, divides the net face area by that module to get a single-skin brick count, scales it by the selected wall-thickness factor, rounds to whole bricks, and then applies waste. Mortar is estimated from net wall volume minus total brick volume, then increased by the same waste allowance.
Frequently Asked Questions
Does this subtract doors and windows automatically?
Yes, if you enter them. Choose either one total opening area or opening rows. The calculator subtracts that area from the gross wall face before counting bricks.
What does single-skin or double-skin mean here?
It is a buying simplification, not a bond-pattern simulator. Single-skin uses one layer of face-area logic. Double-skin simply doubles that count. Custom thickness lets you scale from brick depth or a direct multiplier.
How is mortar estimated?
The calculator takes net wall volume, subtracts the total brick volume implied by the face-area count and thickness factor, then applies the same waste percentage. Real mortar use still moves with bond pattern, workmanship, cuts, and site practice.
Should I use the exact brick size from my supplier?
Yes. This tool does not assume a national standard size. Enter the length, height, and depth from the brick you actually plan to buy.
Is this structural advice?
No. It is a planning estimate for ordering material. It does not replace structural design, engineering review, contractor judgment, or local code checks.