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Brick Calculator
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This Brick Calculator estimates how many bricks you need for a wall, based on the wall's length and height, your brick's dimensions, and the mortar joint thickness between bricks — since the joint effectively increases each brick's footprint. Defaults reflect a common standard brick size (19cm × 9cm) with a 1cm mortar joint, both fully adjustable for your local brick standard. A wastage allowance covers cuts, breakage, and course adjustments. It's built for homeowners and contractors doing a quick material estimate before ordering. Everything runs locally in your browser. Scroll down to enter your wall and brick dimensions.
Features
- Calculates bricks needed from wall area and brick size
- Accounts for mortar joint thickness
- Adjustable wastage allowance
- Works with any regional brick size standard
Why use this brick calculator?
- Reduces the risk of under-ordering bricks
- No manual area/coverage math required
- Fully private — nothing uploaded
- Free with unlimited use
Frequently asked questions
Why does mortar joint thickness matter?
Each brick's effective footprint in the wall is its own size plus the mortar joint around it, so a thicker joint means fewer bricks are needed to cover the same wall area.
What's a standard brick size?
This varies by country — the calculator defaults to roughly 19cm × 9cm (a common metric brick face size), but enter your local brick's actual dimensions for an accurate count.
Does this account for openings like doors and windows?
No, calculate the gross wall area first, then subtract door/window areas from your length×height input before running the calculation for a more accurate count.
How much wastage should I allow?
5% is a typical default; increase it for complex wall shapes, corners, or less experienced bricklaying where more breakage is expected.
Does this calculate mortar quantity too?
No, this calculates brick count only; mortar volume depends on joint dimensions and mix ratio and would need a separate calculation.