Wall Size Calculator
Enter the wall length and height, the area of any openings, the wall type and a waste allowance. The calculator gives the bricks or blocks, the mortar, 25 kg cement bags and tonnes of building sand.
- Bricks and blocks
- Mortar
- Cement and sand
Measure the face of the wall and take off doors, windows and other openings.
A half-brick wall uses about 60 bricks a square metre. Standard bricks are 215 × 65 mm and laid with 10 mm joints. A garden wall 5 m long and 1.8 m high comes to 9 m², about 567 bricks with 5% waste, and about 0.2 m³ of mortar.
Bricks per wall chart
Half-brick walls, 5% waste. Search for a size.
| Wall (m) | Area (m²) | Bricks | Cement bags |
|---|---|---|---|
| 2 × 1 | 2 | 126 | 1 |
| 3 × 1 | 3 | 189 | 1 |
| 5 × 1 | 5 | 315 | 2 |
| 5 × 1.8 | 9 | 567 | 3 |
| 10 × 1 | 10 | 630 | 3 |
| 10 × 1.8 | 18 | 1134 | 5 |
| 10 × 2.4 | 24 | 1512 | 6 |
60 bricks a m².
Wall length and bricks
Half-brick wall, 1.8 m high. Slide the length.
The wall is drawn in stretcher bond, course by course.
How to work out bricks
Area to materials. Step through it.
Measure
Length × height.
Buy all your bricks from one batch so the colour matches.
Half-brick, one-brick or block
Wall types. Compare them.
Garden walls.
Strong walls.
Fast.
Tall or long freestanding walls need piers and movement joints, so check the design rules.
Before you build
Wall checks. Tick each item.
Tick each item as you go.
Lay bricks on a proper concrete footing below frost depth.
What you get
Wall materials. Each tile explains one result.
Or blocks.
Cubic metres.
Bags.
Tonnes.
Net.
A 25 kg cement bag mixed 1 : 5 makes about 0.09 m³ of mortar, enough for about 200 bricks.
Frequently Asked Questions
No question matches that search.
How many bricks are in a square metre?
About sixty for a half-brick wall and one hundred and twenty for a one-brick wall.
How many blocks are in a square metre?
About ten standard concrete blocks of four hundred and forty by two hundred and fifteen millimetres.
How much mortar do I need for a thousand bricks?
About half a cubic metre for a half-brick wall.
What mortar mix should I use?
One part cement to five or six parts building sand for most walls.
How much sand do I need?
About one point six tonnes for each cubic metre of mortar.
How much waste should I allow?
Five per cent for simple walls and ten per cent for walls with many cuts.
Do garden walls need foundations?
Yes. A concrete footing under every wall keeps it from cracking and leaning.
Order once, build once
Work out the bricks, mortar and sand for your wall before you start, and keep the job flowing.
More size calculators
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