MistriCalc → Brick Calculator
Brick Calculator
Brick count, mortar volume, cement bags and sand for any wall — with the common Pakistani 9×4.5×3 inch brick, modular and 230×110×70 mm sizes, joints included.
Materials & quantities explainer
Run your numbers first, then read how it works. Start with the calculator below — the example values are pre-filled — then keep scrolling for the method, a worked example and the questions builders ask most. Everything runs in your browser; nothing you type is stored.
Calculator
To count bricks for a wall, divide the wall volume by the volume of one brick plus its 10 mm mortar joint. A standard modular brick (190×90×90 mm) with joints becomes 200×100×100 mm, so about 500 bricks fill one cubic metre of brickwork. The common Pakistani 229×114×76 mm brick gives about 392 bricks per cubic metre. The leftover space — wall volume minus the bricks at their bare size — is the mortar, which you split into cement and sand by the chosen mix.
Key takeaways
- Modular brick + joint = 200×100×100 mm → ≈ 500 bricks/m³.
- 230×110×70 mm → ≈ 434 bricks/m³ with joints.
- Pakistani 229×114×76 mm → ≈ 392 bricks/m³ with joints.
- Mortar volume = wall volume − bricks at bare size.
- Dry mortar = wet × 1.33, then split by the C:S ratio.
- Add about 5% wastage before ordering.
How brick quantities are calculated
The tool turns your wall into a volume, then sizes one brick with a 10 mm joint added to each face to get the nominal brick volume. Brick count is wall volume ÷ nominal brick volume. Mortar is the gap left over once the bricks (at actual size) are placed.
Worked example: a 10 m × 3 m, 9-inch wall
A boundary wall is 10 m long, 3 m high, 230 mm (9 in) thick, built in 230×110×70 mm bricks with 1:6 mortar. Wall volume = 10 × 3 × 0.23 = 6.9 m³. Nominal brick (with 10 mm joints) = 0.24×0.12×0.08 = 0.002304 m³, so bricks ≈ 6.9 ÷ 0.002304 ≈ 2,995. Bare brick = 0.23×0.11×0.07 = 0.001771 m³; bricks × that = 5.30 m³, so mortar ≈ 6.9 − 5.30 = 1.60 m³. Dry = 1.60 × 1.33 = 2.13 m³; cement = 2.13 ÷ 7 = 0.304 m³ → ≈ 8.8 bags; sand = 2.13 × 6/7 ≈ 1.83 m³. Add 5%: about 3,145 bricks.
Common brick sizes and bricks per m³
| Brick | Actual size | With 10 mm joint | Bricks / m³ |
|---|---|---|---|
| Modular | 190 × 90 × 90 mm | 200 × 100 × 100 mm | ≈ 500 |
| Traditional | 230 × 110 × 70 mm | 240 × 120 × 80 mm | ≈ 434 |
| Pakistani (inch) | 9 × 4.5 × 3 in (229×114×76 mm) | 239 × 124 × 86 mm | ≈ 392 |
Bricks per m³ are the brick-plus-joint figures; actual on-site counts vary with bond and workmanship.
Where this fits in your build
After the brickwork, plan the finish with the plaster calculator for cement and sand, and the paint calculator for litres. For RCC bands and lintels around the masonry, use the concrete calculator.
Frequently asked questions
How many bricks are in 1 cubic metre of wall?
About 500 with a modular brick (200×100×100 mm including joints); about 434 with a 230×110×70 mm brick and about 392 with the Pakistani 229×114×76 mm brick.
How do I include the mortar joint in the count?
Add 10 mm to each brick dimension, then divide wall volume by that nominal brick volume.
How much cement and sand for the mortar?
Take the mortar volume × 1.33 for dry volume, then split by the mix — for 1:6, cement = 1/7 (÷ 0.0347 for bags), sand = 6/7.
What brick size is used in Pakistan?
About 9 × 4.5 × 3 inches (≈ 229×114×76 mm), the common Pakistani site brick. With a 10 mm joint that gives about 392 bricks per cubic metre of wall.
Why is the count lower than wall ÷ brick volume?
Because the mortar joint makes each brick take up more space, so fewer fit than dividing by the bare brick size.
Should I add wastage?
Yes — about 5% for breakage and cutting at corners and openings. This tool also shows that figure.
Brick dimensions follow standard trade practice (modular 190×90×90 mm, traditional 230×110×70 mm, and the Pakistani 9×4.5×3 in / 229×114×76 mm brick). Mortar quantities use the standard 1.33 dry-volume factor for masonry mortar and a 50 kg / 0.0347 m³ cement bag; the 10 mm joint is the conventional bed/perpend thickness.
Last reviewed 2026-06-14