Brick Calculator for Walls

Estimate wall bricks from net face area, actual brick dimensions, mortar-joint thickness, wall layers, allowance, pallet quantity and price.

Brick quantity formulas

The calculator treats one laid brick as a rectangular face module that includes one horizontal and one vertical mortar joint.

Module face area = (brick length + joint) × (brick height + joint).

Net wall area = gross wall face area − openings.

Calculated bricks = net wall area ÷ module face area × wall layers.

Bricks to order = calculated bricks × (1 + allowance % ÷ 100), rounded up.

Pallets represented equals ordered bricks divided by the entered pallet quantity, rounded up. Cost equals ordered bricks multiplied by the entered price per brick.

Scope: this estimates rectangular wall-brick faces. It does not calculate patio pavers, fire pits, arches, gables, corners, returns, bond-specific cuts, mortar volume, reinforcement, lintels or structural design. Pallet counts are a packaging estimate and do not require buying full pallets. Confirm actual brick, joint and pallet dimensions with the supplier.

Six calculated examples

Wall and brick assumptions	Calculated result
20 × 8 ft; 7.625 × 2.25 in brick; 0.375 in joint; one layer; 5%	160 ft² net; 1,098 bricks before allowance; 1,152 bricks to order; 3 pallets at 500
20 × 8 ft minus 21 ft² opening; same brick; one layer; 5%	139 ft² net; 954 bricks before allowance; 1,001 bricks to order; 3 pallets at 500
10 × 8 ft; 8 × 2.25 in brick; 0.5 in joint; one layer; 10%	80 ft² net; 493 bricks before allowance; 543 bricks to order
100 ft² direct area; modular US brick; two layers; 5%	1,372 bricks before allowance; 1,440 bricks to order
10 × 2.5 m; 215 × 65 mm brick; 10 mm joint; one layer; 5%	25 m² net; 1,482 bricks before allowance; 1,556 bricks to order
100 m² direct minus 10 m²; same metric brick; one layer; 5%	90 m² net; 5,334 bricks before allowance; 5,600 bricks to order; 12 pallets at 500

How to use this brick calculator

Choose wall dimensions or enter a measured face area directly.
Subtract door and window areas only when they are not already excluded.
Enter actual brick face dimensions and the intended mortar-joint thickness. Do not enter nominal module dimensions and then add the joint again.
Use one layer for a single-wythe face. Increase the layer count only when the same face area genuinely has additional brick wythes.
Set an explicit cutting/breakage allowance and copy the supplier’s pallet quantity and unit price.

Related calculators

Concrete Block Calculator for concrete masonry units.
Paver Calculator for patios and walkways.
Square Footage Calculator for combined areas.
Concrete Calculator for slabs and footings.

Brick Calculator for Walls: Bricks, Pallets and Cost