Brick Calculator – Bricks Needed for a Wall
Free brick calculator: enter wall dimensions, brick size and mortar joint to estimate how many bricks you need. Includes waste factor. No sign-up, runs in your browser.
Brick Calculator
Estimate bricks needed for a wall. Enter wall and brick dimensions in feet. Standard brick: 8" × 2.25".
How the brick calculator works
bricks = (wall_length × wall_height) ÷ (brick_with_mortar_area) × (1 + waste%)
Brick area includes mortar: (brick_length + joint) × (brick_height + joint). Use consistent units (inches or cm) for all dimensions.
Estimating bricks for walls and projects
Whether you are building a garden wall, a fireplace, or a full exterior, knowing how many bricks to order saves time and money. Ordering too few means delays and possible color mismatches on a second batch. Ordering too many wastes money and storage space. A brick calculator uses the wall area and the effective area each brick covers (including mortar) to give you a reliable estimate.
Brick dimensions vary by region and type. US modular bricks are typically 7.5 × 3.5 × 2.25 inches. UK bricks are 215 × 102.5 × 65 mm. Always measure your actual bricks or check the supplier spec. The mortar joint adds to each brick’s footprint: a 3/8 inch joint on all sides increases the area per brick. Our calculator accounts for this so you get a realistic count.
A waste factor of 5–10% is standard. Bricks get cut at corners and openings; some may break during handling or laying. For complex patterns, arches, or if you are new to bricklaying, use 10% or more. It is better to have a few extra than to run short. Use our concrete calculator for footings and our paint calculator if you plan to coat the wall. For floor coverage, try the tile calculator.