How to use the Brick Quantity Calculator
- 1. Enter the wallLength, height, thickness and the door and window area to deduct.
- 2. Set brick and mortarBrick size, joint thickness, mortar ratio and dry volume factor.
- 3. Get quantitiesBricks with wastage, cement bags, sand in m³ and cft, with the working.
How brickwork is estimated
Brickwork volume = (length × height − openings) × thickness. One brick with its mortar joint occupies (l + j)(b + j)(h + j). Number of bricks = volume / volume of one brick with mortar.
Wet mortar = brickwork volume − (number of bricks × brick volume). Multiply by the dry volume factor (commonly 1.33) to allow for voids and bulking. Split it by the ratio: cement = dry volume × 1/(1 + 6) for 1:6. Cement bags = cement m³ × 1440 / 50.
Worked example and site tips
1 m³ of brickwork with 190 × 90 × 90 mm bricks and 10 mm joints: one brick with mortar = 0.2 × 0.1 × 0.1 = 0.002 m³, so 500 bricks. Brick volume = 500 × 0.001539 = 0.7695 m³, wet mortar = 0.2305 m³, dry = 0.307 m³. In 1:6, cement = 0.0438 m³ = 63 kg ≈ 1.26 bags, sand = 0.263 m³.
- Traditional 230 × 110 × 75 mm bricks need more bricks per m³ than modular bricks.
- Brick walls are often 1:6 mortar; half-brick partitions often use 1:4.
- All factors are thumb rules; follow your office or textbook values.
Frequently asked questions
How many bricks are in 1 m³?
With 190 × 90 × 90 mm modular bricks and 10 mm joints, about 500 before wastage. The tool works it out for any size you enter.
Why multiply wet mortar by 1.33?
Dry cement and sand shrink in volume when mixed with water and voids fill up. 1.33 is a common thumb rule, but some offices use 1.27 or other values, so it is editable.
Should I deduct small openings?
Measurement rules (IS 1200) say which openings to deduct. For a rough estimate, deduct all doors and windows.
Is this calculator free?
Yes. You enter your name and WhatsApp number once to see your result, and all other Uncodemy tools then open without the form. Everything is calculated in your browser.