Brick Calculator Online
Estimate how many bricks you need from wall area and bricks per m². Add waste. Free.
Length × height; subtract doors/windows
Single skin ~60; double ~120
Brick calculator online
Use this brick calculator online to estimate how many bricks you need. Enter the wall area in square metres (length × height, minus doors and windows). Set bricks per m²—about 60 for a single-skin wall with standard UK bricks and 10 mm joints—and add a waste percentage. The result is the number of bricks to order. For double-skin walls, use about 120 per m².
Frequently Asked Questions
How many bricks do I need?
Enter the wall area (length × height in m² or sq ft) or length and height separately. Set brick size and mortar joint; the calculator gives the number of bricks needed. Add 5–10% for waste and cuts.
What is a standard UK brick size?
Standard UK brick is about 215 mm × 102.5 mm × 65 mm. With 10 mm mortar joints, about 60 bricks per m² of single-skin wall is a common estimate. The calculator lets you adjust size.
Is the brick calculator free?
Yes. Free to use. For estimating only; brick sizes and bonds vary.
How do I allow for doors and windows?
Work out total wall area then subtract the area of openings (doors and windows). Enter the net wall area into the calculator.
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