My Construction Calculator
Browse CategoriesBrick & Block

BRICK & BLOCK · FIELD TOOL

Brick Calculator

Bricks per m² = 1 ÷ ((brick length + joint) × (brick height + joint)). A 230 × 75 mm brick with 10 mm joints gives 49 bricks per m². A 10 × 3 m wall minus 4 m² of openings is 26 m², so 1,275 bricks (1,339 with 5% breakage) plus about 2.5 bags of cement for 1:6 mortar.

Inputs

Results update as you type.

Quick Start
Wall
m
m
m²
Bricks
mm
%
Mortar
Wall elevationopenings 4 m²10 m3 mmyconstructioncalculator.com
Diagram updates as you type.

Results

Check the working before you order.

Bricks to order
1,339bricks
Units per m² (per skin)49.02
Cement (50 kg bags)2.5 bags
Sand0.53 m³
Mortar (wet)0.464 m³
Net wall area26.0 m²
Price This optional: add your own prices

Your prices are remembered on this device only.

Send Order WhatsApp, SMS or email to your supplier
Include
WhatsAppSMSEmail
Working
  1. Net area = 10.00 × 3.00 − 4.0 = 26.00 m²
  2. Units per m² = 1 ÷ ((L + j) × (H + j)) = 1 ÷ ((230.0 + 10.0) × (75.0 + 10.0) mm²) = 49.02
  3. Units = 26.00 × 49.02 × 1 skin = 1,274.5; + 5% = 1339
  4. Mortar = wall volume − unit volume = 0.442 m³ (wet)
  5. Dry mortar = wet × 1.33; cement = dry ÷ 7 = 2.54 bags (126.9 kg)
Results are estimates for planning and material ordering only. They are not a substitute for structural design or approval by a qualified engineer. Read the full disclaimer.
Formulas


Net wall area   = length × height − openings
Bricks per m²   = 1 ÷ ((L + joint) × (H + joint))
Bricks          = net area × bricks per m² × skins × (1 + wastage %)
Mortar (wet)    = net area × wall thickness − volume of bricks
Cement (1 : n)  = mortar × 1.33 ÷ (1 + n)


Worked Example


A 10 m × 3 m half-brick wall in 230 × 110 × 75 mm bricks, 4 m² of openings, 10 mm joints, 1:6 mortar:


    

  1. Net area = 30 − 4 = 26 m²
    2. 

  2. Bricks per m² = 1 ÷ (0.24 × 0.085) = 49.0
    3. 

  3. Bricks = 26 × 49.0 = 1,275; with 5% = 1,339
    4. 

  4. Mortar = 0.442 m³; with 5% = 0.464 m³ → cement ≈ 2.5 bags (50 kg), sand ≈ 0.53 m³
    5. 



Bricks per Square Metre (10 mm joints, one skin)






Brick
Face size
Per m²






Standard (South Asia)
230 × 75 mm
49.0




UK / EU
215 × 65 mm
59.3




Modular
190 × 90 mm
50.0




German NF
240 × 71 mm
49.0




US modular (⅜″ joint)
7⅝ × 2¼ in
6.86 per ft²






For blocks, use the concrete block, hollow block or AAC block calculators.


Frequently Asked Questions
How many bricks are in 1 m² of wall?
About 49 standard 230 × 75 mm bricks, 50 modular (190 × 90) bricks or 60 UK (215 × 65) bricks per m² of half-brick wall with 10 mm joints. A one-brick wall needs twice as many.
How many bricks per square foot?
About 6.9 US modular bricks (7⅝ × 2¼ in) per ft² with 3/8 in joints.
How much mortar do bricks need?
Roughly 0.3–0.35 m³ of wet mortar per 1,000 standard bricks in a half-brick wall. The mortar calculator works it out for your brick and joint.
How much wastage should I add for bricks?
5–10% for breakage in delivery and handling, cuts at corners and openings, and rejects.
Embed This Calculator on Your Website
Free for any website: contractors, suppliers, blogs and schools. Paste this code where you want the calculator to appear. It works in WordPress (Custom HTML block), Wix, Squarespace and plain HTML.
Preview
Mortar CalculatorCalculate mortar for brick or block walls, with cement, lime and sand for ASTM C270 Type M, S, N or O, or cement-sand ratios. Mortar per 1,000 bricks. Free accountWall Area CalculatorCalculate net wall area for masonry, plaster, paint or cladding (walls plus gable triangles, minus doors and windows) for one face or both faces. Free accountPlastering CalculatorCalculate cement bags and sand for wall and ceiling plaster from area, thickness and mix ratio (1:3, 1:4, 1:6), using the dry volume method. Working shown.Concrete Block CalculatorCalculate concrete blocks (CMU) for a wall, mortar with cement bags and sand, and core grout for reinforced block walls: fully grouted or cells at set spacing.Compound Wall Construction Cost CalculatorEstimate a compound (boundary) wall: foundation, concrete base, RCC pillars, bricks or blocks and plaster, and the cost per metre or foot at your rates.
All Brick & Block Calculators