Estimate how many bricks, concrete blocks and bags of mortar you may need for a garden wall, small outbuilding wall, repair, extension section or DIY brickwork project.
Enter the size of your wall, choose the material type, then add any openings and waste allowance.
For a standard UK metric brick wall laid in stretcher bond, a common allowance is about 60 bricks per square metre for a single skin wall. A double skin wall is roughly 120 bricks per square metre.
Standard 440 × 215mm blocks are often estimated at around 10 blocks per square metre before waste. This calculator uses that as the default blockwork rate.
This calculator does not include foundations, concrete footings, wall ties, piers, coping stones, DPC, render, labour, skips or delivery charges.
Material calculators are useful for early planning, but brickwork also depends on bond pattern, cuts, corners, piers, wall thickness, access, delivery and the condition of the ground.
For a simple straight wall, 5–10% may be enough. For piers, returns, cuts, reclaimed bricks or awkward layouts, increase the waste allowance.
A wall is only as good as what it sits on. Garden walls, boundary walls and retaining walls may need proper footing depth and width.
Older properties may use imperial or non-standard bricks. If matching an existing wall, measure the actual brick and mortar gauge before ordering.
As a general UK guide, allow around 60 standard bricks per square metre for a single skin wall and around 120 bricks per square metre for a double skin wall.
For standard 440 × 215mm concrete blocks, allow around 10 blocks per square metre before waste.
Yes. Most projects should include at least 5–10% extra for cuts, breakages and selection. More complex walls may need 15–20%.
Yes, it gives a basic mortar bag estimate based on your chosen bag coverage. Actual use depends on joint thickness, brick type, wastage and laying method.
No. Foundations, concrete footings, drainage, retaining wall design, coping stones, piers and labour are not included.
You can use it for a rough material quantity, but retaining walls need proper structural consideration. Loads, drainage and wall design matter.
Yes, but use the custom bricks per m² option if the bricks are not standard UK metric size or if the mortar joint spacing is different.
Use this calculator for a rough materials estimate, then check wall design, foundations, drainage and access before ordering.
