Brick Wall Calculator — Bricks, Cement & Sand

How this brick wall calculator works

Brickwork estimation has two parts: the bricks themselves, and the mortar that binds them. This calculator first finds the wall's volume in cubic metres, then applies two industry thumb rules — 500 bricks per cubic metre of brickwork, and 0.30 m³ of wet mortar per cubic metre of brickwork — to work out both materials in one go.

The formula

• Wall volume (m³) = length × height × thickness
• Bricks = wall volume × 500, rounded up
• Wet mortar = wall volume × 0.30 m³; dry mortar = wet × 1.33
• Cement bags = (dry mortar × 1/7) ÷ 0.0347, rounded up — for 1:6 mortar
• Sand (cft) = dry mortar × 6/7 × 35.3147

Worked example

A 10 ft × 10 ft wall, 9 inches (0.2286 m) thick, is 3.048 × 3.048 × 0.2286 = 2.12 m³ of brickwork. That needs 2.12 × 500 = 1,062 bricks. Mortar: 2.12 × 0.30 × 1.33 = 0.85 m³ dry. Cement = 0.85 × 1/7 ÷ 0.0347 = 3.5 → 4 bags; sand = 0.85 × 6/7 × 35.31 = 26 cft.

Notes for Indian sites

Use 9-inch (230 mm) walls for external and load-bearing walls, and 4.5-inch (115 mm) only for internal partitions. Many regions still use traditional 230 × 110 × 70 mm bricks, which need slightly more mortar — if yours are non-modular, add about 10% to the mortar figures. Deduct large openings (doors, windows) from the wall area for big walls; for a single room it rarely matters. Add 5–10% wastage to the brick count for breakage in transport and cutting, and order sand from a reliable source — overly silty sand weakens mortar. Cure the wall with water for at least 7 days after construction for full mortar strength.