Wall Brick Calculator
Enter your wall and brick dimensions to estimate total bricks needed, including waste allowance.
How this bricks calculator works
This wall brick calculator estimates the number of bricks using the volume method. Instead of only area, it considers wall thickness and mortar joints. That gives you a more realistic estimate for single-skin and thicker walls.
The formula is simple in principle:
- Net wall volume = (Wall length × Wall height − Openings area) × Wall thickness
- Modular brick volume = (Brick length + joint) × (Brick width + joint) × (Brick height + joint)
- Bricks required = Net wall volume ÷ Modular brick volume
Then the result is rounded up and increased by your waste percentage.
Why accurate brick estimation matters
Ordering too few bricks can stall your project, while over-ordering ties up cash and creates storage headaches. A fast estimate helps with:
- Budget planning for materials and labor
- Comparing quotations from suppliers
- Scheduling deliveries in stages
- Reducing waste and broken stock on site
Step-by-step: measure your wall correctly
1) Measure wall length and height
Take actual finished dimensions in meters. For irregular walls, break them into rectangles and add the areas.
2) Subtract openings
Add the total area of windows, doors, vents, and any other openings. This should be entered in square meters.
3) Confirm wall thickness
Use millimeters for thickness (for example, 100 mm, 200 mm, or more depending on your wall type).
4) Use the real brick size
Brick sizes vary by country and manufacturer. Enter your exact length, width, and height from the product specification.
5) Set mortar and waste values
A 10 mm mortar joint is common, and 5–10% waste is typical depending on wall complexity and cutting.
Common brick sizes (examples)
- Modular brick (common): 190 × 90 × 90 mm
- UK standard brick: 215 × 102.5 × 65 mm
- US standard modular: about 194 × 92 × 57 mm (varies by manufacturer)
Always verify your actual product dimensions before placing orders.
Practical tips for better estimates
- Add extra waste if your wall has many corners, arches, or angled cuts.
- Separate different wall sections and calculate each one for better accuracy.
- Consider a small contingency for color matching in future repairs.
- If structural requirements apply, confirm calculations with an engineer or contractor.
Quick FAQ
Does this calculator include mortar?
Yes. The brick count uses brick dimensions plus joint thickness, so mortar spacing is included in the estimate.
Can I use it for boundary and garden walls?
Absolutely. Just input the correct thickness and opening area (if any).
Is the answer exact?
It is a strong planning estimate. Site conditions, breakage, workmanship, and bond pattern can change final quantities.