CalcVind

Brick Calculator

Bricks, cement and sand for a wall

Wall and Bricks

Wall size

A door is about 21 sq ft, a window about 15

sq ft
mm
%

Materials for Your Wall

1,712Bricks
5Cement (50 kg bags)
29.4 cftSand
179 sq ft
Wall area
3.82 m³
Brickwork volume
0.731 m³
Mortar (wet)
0.83 m³
Sand
9.1
Bricks per sq ft
Read the guide · 6 minHow Many Bricks, Cement and Steel for a 1,000 sq ft House?Read the guide · 4 minTMT Steel Bar Weight per Metre: The D²/162 Formula and Chart
  1. 1
    Enter the wall size
    Length, height, doors and windows
  2. 2
    Pick thickness and bricks
    And the mortar mix
  3. 3
    See the materials
    Bricks, cement bags and sand

How are bricks and mortar calculated?

Each brick plus its mortar joint covers a set area of the wall face. A 9-inch wall is two bricks thick. The space left between bricks is filled with mortar.

Bricks = wall area ÷ ((brick length + joint) × (brick height + joint)) × layers

Dry mortar = wet mortar × 1.33 · Cement = dry ÷ (1 + sand parts)

Which mix to use

1:6 cement–sand mortar is standard for brickwork in load-bearing and partition walls. Use 1:4 for half-brick (4.5 inch) walls that need extra strength and for exposed work in wet areas.

Buying bricks

Bricks are sold by the thousand. Buy around 5% extra for breakage in transport and cutting; more for poor-quality bricks. Soak clay bricks before laying so they don't suck water out of the mortar.

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Frequently asked questions

How many bricks are needed for 100 sq ft?

About 455 traditional bricks (230 × 110 × 75 mm) for a 4.5 inch wall and about 910 for a 9 inch wall, before wastage.

How many bricks are in 1 m³ of brickwork?

About 500 modular bricks (190 × 90 × 90 mm with 10 mm joints), or about 430 traditional bricks (230 × 110 × 75 mm).

Does this include plaster?

No. Plaster is extra: use our Plaster Calculator for the wall's surface.

Last reviewed: October 2026