Estimate Bricks, Mortar, Cement & Sand for Any Wall
Whether you're building a boundary wall in Lahore, a partition wall for a new home, or a load-bearing structure on a commercial site, accurate brick estimation saves money and prevents mid-project shortages. This calculator handles single and double brick walls, Pakistani standard Awwal class sizes, and international brick dimensions — giving you brick count, mortar volume, cement bags, and sand quantity instantly.
4.5 inch / Half Brick — Partition walls, fences, non-load-bearing
9 inch / Full Brick — Load-bearing walls, external walls
Start by choosing Metric, Imperial, or Pakistani from the unit toggle at the top of the calculator. Pakistani mode automatically fills in the Awwal class standard brick size (9×4.5×3 inches) with a 0.5-inch mortar joint — the most common specification across construction sites in KPK, Punjab and Sindh.
Select Single or Double brick wall. A single wall is one brick laid flat — the 4.5-inch wall common in partition and boundary walls. A double wall is two bricks wide — the 9-inch wall standard for load-bearing external walls. Then enter your wall length and height. The wall area calculates automatically.
The default brick dimensions match the most common size for your selected unit system. If your bricks are non-standard — for example modular metric bricks at 215×65mm, or locally sourced handmade bricks — open the Customise Brick Size section and enter your actual measurements. Don't forget to adjust the mortar joint thickness if needed.
Choose your wastage factor — 10% is right for most jobs. Select your cement-to-sand mix ratio (1:5 for general work, 1:4 for load-bearing). Hit Calculate and read off your brick count, mortar volume, cement bags and sand quantity. Use the Copy or Print buttons to save your estimate.
The core formula for estimating bricks is straightforward: Bricks = Wall Area ÷ ((Brick Length + Mortar Joint) × (Brick Height + Mortar Joint)). This gives you the number of bricks needed to cover one face of the wall. For a double-thickness wall, multiply the result by two.
Here is a fully worked example. Consider a wall that is 5 metres long and 3 metres high, giving a wall area of 15 m². Using standard metric bricks measuring 230mm × 76mm with a 10mm mortar joint:
Bricks = 15 ÷ ((0.23 + 0.01) × (0.076 + 0.01)) = 15 ÷ (0.24 × 0.086) = 15 ÷ 0.02064 ≈ 727 bricks. Adding 10% wastage gives 727 × 1.10 = 800 bricks to order. For a double brick wall, you would need approximately 1,600 bricks.
Always remember that this calculation gives the gross wall area. You must manually deduct the area of any doors, windows or other openings from the wall area before calculating your brick count.
The standard Awwal brick size in Pakistan is 9 inches × 4.5 inches × 3 inches (228mm × 114mm × 76mm). With a standard 0.5-inch (approximately 10mm) mortar joint, the nominal working size becomes about 9.5 inches × 3.5 inches on the face. These bricks are sold in thousands and prices vary significantly by kiln, region and quality grade. Awwal class bricks are well-fired with a uniform reddish colour and ring when struck together. Second class (Doam) bricks are similar in size but lower in fired density and strength. Note that handmade kiln bricks can vary by ±5mm in any dimension, so always measure a sample before basing your calculation on the standard size.
The standard UK metric brick measures 215 × 65 × 102.5mm. With a 10mm mortar joint, the working face size becomes 225 × 75mm. This yields approximately 60 bricks per square metre for a single-leaf wall. Metric bricks are highly consistent in size due to factory production and are available in a wide range of colours and textures including wirecut, pressed, and handmade finishes.
The US modular brick measures 194 × 57 × 92mm (approximately 7⅝ × 2¼ × 3⅝ inches). With a standard 10mm (⅜ inch) mortar joint, the working face becomes approximately 203 × 67mm. This gives roughly 6.75 bricks per square foot for a single wythe wall. US bricks are available in modular, queen, king, and utility sizes, each with slightly different dimensions suited to different applications.
A single brick wall, also called a half-brick or 4.5-inch wall, is one brick thick when laid flat. It is used for non-structural applications such as internal partition walls, garden boundary fences, and decorative screening walls. Single brick walls are not suitable for load-bearing applications above one storey without reinforcement.
A double brick wall, also called a full brick or 9-inch wall, is two bricks wide. This is the standard for external load-bearing walls, structural columns, and retaining walls. In Pakistani building practice, 9-inch walls are used for virtually all external walls of residential buildings — they provide excellent thermal mass for temperature regulation and sufficient structural strength for two- to three-storey construction.
For heavy foundations and structures requiring exceptional strength, 13.5-inch walls (three bricks wide) are sometimes used. These are common in basement retaining walls and the lower storeys of commercial buildings in Pakistan where seismic loads are a consideration.
A useful rule of thumb is that mortar occupies approximately 30% of the total wall volume. The total wall volume is calculated as wall area multiplied by wall thickness. For a single brick wall using 110mm (4.5-inch) bricks, the thickness is 0.114 metres; for a double wall, it is 0.228 metres.
Here is a worked example using a 1:5 cement-to-sand mix. Consider a single brick wall 5m long × 3m high × 0.114m thick. The wall volume is 5 × 3 × 0.114 = 1.71 m³. The mortar volume is 1.71 × 0.30 = 0.513 m³ of wet mortar. Applying a dry volume correction factor of 1.33 gives 0.513 × 1.33 = 0.682 m³ of dry materials.
For a 1:5 mix, the total ratio parts are 6 (1 cement + 5 sand). Cement volume = 0.682 × (1/6) = 0.114 m³. Converting to weight using cement bulk density of 1,500 kg/m³ gives 0.114 × 1500 = 171 kg, which is approximately 4 bags of 50 kg cement. Sand volume = 0.682 × (5/6) = 0.568 m³ of loose dry sand.
The dry volume correction factor of 1.33 accounts for the bulking of dry sand and cement when measured loosely compared to the compacted volume in the finished mortar joint. This is a critical adjustment that is often overlooked in simple calculations.
Brick wastage comes from several sources: breakage during transit and manual unloading from trucks, cutting bricks at corners and around door and window openings, complex bonding patterns like herringbone or Flemish bond that require more cuts, and colour or batch variation that forces you to discard mismatched units.
The standard wastage guidelines are: 5% for clean machine-cut bricks delivered on pallets to an accessible site with an experienced mason. 10% for standard residential and commercial projects with normal delivery conditions. 15% for curved walls, arched openings, herringbone patterns, or sites with difficult access where bricks are handled multiple times.
Never order the exact calculated amount. Running short mid-project is far more expensive than having a small surplus. Bricks from a second delivery batch may not match the colour of the first batch — kilns produce slightly different shades with every firing. Order all your bricks from a single batch if possible.
Brick prices in Pakistan vary significantly by region, kiln quality, and season. As a general guide for 2024–2025: Awwal (First Class) bricks range from PKR 15–25 per brick depending on location and quality. Doam (Second Class) bricks are typically PKR 10–18 per brick. When buying in bulk, prices per 1,000 bricks generally range from PKR 15,000–25,000.
Major cities such as Lahore, Karachi, Islamabad, and Abbottabad each have different prevailing rates influenced by the proximity of brick kilns, transport costs, and local demand. Always get at least three quotes from local kilns or suppliers before committing to a purchase.
Note: These prices are estimates for informational purposes only and change frequently due to fuel costs, clay availability, and seasonal demand fluctuations.
1. Order from a single kiln or batch. Colour consistency across your wall depends on all bricks coming from the same firing. Mixing batches almost always results in visible colour banding that is impossible to fix once the wall is built.
2. Store bricks properly on site. Stack bricks on a hard, dry surface and cover them with a tarpaulin to protect against rain. Wet bricks absorb less mortar and create weaker joints. Never stack bricks directly on soft ground where they can sink and pick up mud.
3. Wet bricks before laying in hot conditions. In temperatures above 35°C, lightly dampen bricks before laying to improve mortar adhesion and prevent them from drawing moisture out of the mortar too quickly, which causes weak joints.
4. Use a spirit level and string line for every course. Keeping walls plumb (vertical) and level (horizontal) is essential for structural integrity and appearance. Check every three to four courses with a long spirit level and adjust immediately.
5. Deduct openings from your wall area. Before calculating your brick count, subtract the area of all doors, windows, and other openings. A standard door opening (0.9m × 2.1m) saves roughly 90 bricks on a single wall — failing to deduct wastes money.
6. Consult a structural engineer for tall walls. Unreinforced brickwork has height limits that depend on wall thickness, brick strength, and mortar class. For walls over 3 metres high, always get professional advice on whether reinforcement, piers, or buttresses are needed.