How to calculate the number of bricks
First, calculate how many bricks fit in 1 m² of wall, based on the brick's visible face (length × height). Then multiply by the total wall area, including the waste margin.
Formula
Bricks/m² = 1 ÷ (length × height, in meters). Total = wall area × bricks/m² × (1 + waste%).
Common brick sizes
A common hollow ceramic brick has roughly a 19 × 9 cm face (the defaults in this calculator) — but sizes vary widely by region and product. Check the packaging or spec sheet of the specific brick you'll buy.
Door and window openings
For a more precise count, subtract the area taken up by doors and windows from the wall area before entering it into this calculator.
Frequently asked questions
Do I need to subtract doors and windows from the wall area?
Yes, for a more accurate count, subtract the opening area (doors, windows) from the total wall area before using the calculator.
What waste percentage is recommended for bricks?
The market standard is between 5% and 10%, depending on material quality and crew experience.
Does this work for concrete blocks too?
Yes, just enter the dimensions of the visible face of the specific block you'll use.
Does the result include the mortar for laying the bricks?
Not directly — this calculator focuses on the brick count; for the laying mortar, use the mortar calculator separately.