Example 1
- 15 m² − 2 m² openings
- face 0.09 m² + 5% waste
152 bricks
How many bricks for 15 m² − 2 m² at 0.09 m² face and 5%? 13÷0.09×1.05 → 152.
Brick Calculator
Enter wall area and the brick face including the joint. The calculator divides net area by the face, adds waste, and rounds up. A 15 m² wall minus 2 m² at 0.09 m² and 5% is 152 bricks. A 20 m² wall at 0.1 m² and 10% is 220.
Results
Wall area, Brick face area incl. joint, Waste (%) and Openings. The result shows up here.
Quick estimate: net area ÷ brick face, plus waste for cuts. Related: wall area, paint.
How the results are calculated
Net13 m²
Face0.09 m²
Waste5%
Bricks152
The brick calculator counts pieces from area. The formula rounds up ((area − openings) ÷ face) × (1 + waste/100). Face is one brick including the joint.
A 15 m² wall minus 2 m² at a 0.09 m² face and 5% is 152 bricks. A 10 m² wall at 0.08 m² and 10% is 138. On 20 m² and a 0.1 m² face the chart shows 210, 220, and 230 at 5%, 10%, and 15%; at 10% the primary result is 220.
Enter wall area and brick face including the joint. Waste, openings, and price are optional. Empty openings deduct nothing. A comma in 0.09 works like 0.09. Take area from the wall-area page.
A 4×3×2.6 m room is 36.4 m² of walls. Paint for that wall lives on the paint page. Floor area does not turn into bricks.
Five percent waste is often enough on a straight wall; corners tend toward 10%. 151.7 pieces is 152. Entering face 9 instead of 0.09 understates the count a hundred times.
Enter 15, 0.09, 5%, and openings 2: 152. Then 20 and 0.1 at 10%: 220 bricks.
How to use this calculator
- Enter wall area in m², for example 15 or 20.
- Enter brick face including the joint in m², for example 0.09 or 0.1.
- Optionally deduct openings and set waste, usually 5–10%.
- Click Calculate. 15 minus 2 at 0.09 and 5% is 152. 20 m² at 0.1 and 10% is 220.
- Wall square meters are on the wall-area page. This calculator returns the brick count.
Formula
net = max(0, area − openings)
N = ⌈ (net ÷ face) × (1 + waste/100) ⌉
Face is one brick including the joint. A 15 m² wall minus 2 m² at 0.09 m² and 5%: 13 ÷ 0.09 × 1.05 ≈ 151.67 → 152. A 20 m² wall at 0.1 m² and 10% is 220.
Bricks for a 15 m² wall
Net ÷ face × (1 + waste), rounded up. 15 m² minus 2 m² at 0.09 m² and 5% is 152 bricks.
- m²
- Wall area. 15 − 2 = 13 m² net. At a 0.09 face and 5% that is 152 bricks.
- face
- One brick including the joint. 0.09 m² on 13 m² plus 5% is 152.
- waste
- Percent for cuts. On 20 m² at 0.1 m²: 5% → 210, 10% → 220, 15% → 230.
- zaokr.
- Round up. 151.67 becomes 152, because you buy whole bricks.
Usage examples
Example 2
- 10 m² / 0.08 m²
- +10% waste
138 bricks
10 m², 0.08 m² face, 10% waste → 138 bricks.
Example 3
- 20 m² / 0.1 m²
- chart: 5/10/15% → 210/220/230
220 bricks (10%)
20 m², 0.1 m² face, 10% → 220 (chart: 210 / 220 / 230).
Example 4
- 20 m²
- face 0.1 m²
- no waste
200 bricks
20 ÷ 0.1 = 200. Ten percent waste adds 20 and gives 220.
Example 5
- 20 m²
- face 0.1 m²
- +5% waste
210 bricks
20 ÷ 0.1 × 1.05 = 210. That is the first bar on the waste chart.
Example 6
- 36.4 m²
- face 0.09 m²
- +5% waste
425 bricks
Area from a 4×3×2.6 m room. 36.4 ÷ 0.09 × 1.05 ≈ 424.67 → 425.
Related calculators
Frequently asked questions
How do I calculate how many bricks I need from wall area and brick face?
Subtract openings, divide by the brick face including the joint, multiply by (1 + waste/100), and round up. 15 m² − 2 m² at 0.09 m² and 5% → 152 bricks.
How many bricks do I need for a 15 m² wall minus 2 m² openings at a 0.09 m² face and 5% waste?
152 bricks. 13 ÷ 0.09 × 1.05 ≈ 151.67, and the calculator rounds up. A 20 m² wall at 0.1 m² and 10% is 220.
Is this a mortar or cement calculator for masonry?
No. Here you get a brick count. Mortar and cement mix live on separate construction cards.
Does the result show the cost of 1000 bricks?
No. The calculator reports piece count from area and face. Pack or pallet price is outside this tool.
Is this a free brick calculator?
Yes. Enter wall area, face with joint, and waste, and you see the brick count at once. No account required.
How is brick count calculated?
The calculator subtracts openings from area, divides by the brick face including the joint, multiplies by (1 + waste/100), and rounds up. A 15 m² wall minus 2 m² at a 0.09 m² face and 5% is 152 bricks.
What is the brick face including the joint?
The area of one brick plus mortar joint, in m² (or ft² in US units). For example 0.09 m². It is not side centimeters — convert length × height with the joint to square meters first.
What waste should I choose?
A straight wall is often 5%. Corners and many openings tend toward 10%. On 20 m² at a 0.1 m² face the chart shows 210 / 220 / 230 at 5% / 10% / 15%.
How are openings subtracted?
From the area before dividing by the face. An empty field means zero. At 15 m² with 2 m² openings, net area is 13 m².
Why does the result round up?
You buy whole bricks. 151.7 pieces is 152. A fraction of a brick is not sold on a pallet.
Where do I get wall area?
From the wall-area calculator. A 4×3×2.6 m room is 36.4 m² with no openings. Paste that area here.
Does the waste chart change the main result?
No. The chart shows the same wall at 5%, 10%, and 15% beside it. The primary result follows the waste field you enter.
How is this different from paint?
Here the result is brick count. Paint counts liters from coverage. Both can use wall area from the wall-area page.
How do I enter a 25×12 cm brick with joint?
Compute the face in m², for example 0.27×0.13 = 0.0351, and enter that number. The field does not take side centimeters.
Does a comma in 0.09 work?
Yes. 0.09 and 0,09 are the same face. At 15 m², 2 m² openings, and 5% the result stays 152.
Knowledge sources
Brick count comes from wall area and one brick face including the joint. Area units below from NIST.
Page updated October 12, 2026.