Brick / Block Calculator

Formula

bricksPerM² = (1000 / (brickH + joint)) × (1000 / (brickL + joint)) × bondMultipliernetArea = grossArea − (openings × openingArea)bricksNeeded = ⌈netArea(m²) × bricksPerM² × (1 + waste/100)⌉mortarVolume = netArea × mortarPerM² × bondMultipliercementBags = ⌈mortarVolume × 7⌉ (1:4 mix)

Parameters

Brick Type

Standard (215×65mm), modular, CMU 4/6/8 inch.

Bond Pattern

Stretcher (1×), English (2×), Flemish (1.5×), Stack (1×).

Mortar Joint

Joint thickness in mm (default: 10).

Openings

Number of doors/windows to deduct.

Area per Opening

Average opening area in sq ft.

Waste %

Extra for cuts and breakage.

Results

Bricks Needed

Total bricks/blocks including waste.

Mortar Volume

Mortar needed in cubic meters.

Cement Bags

Bags of cement for 1:4 mortar mix.

Example

netArea = 200 sq ft = 18.58 m²bricksPerM² = (1000/75) × (1000/225) = 59.26bricksNeeded = ⌈18.58 × 59.26 × 1.05⌉ = 1,156 pcs

Common Use Cases

• Garden and boundary walls
• Retaining walls
• House extensions and new builds
• Commercial masonry projects

Notes

• English bond uses roughly double the bricks of stretcher bond.
• CMU blocks are larger — fewer units per area but heavier.
• Always order 5-10% extra for cuts and breakage.