Craft

Brick & Block Calculator

Estimate bricks or concrete blocks for a wall including mortar joints and openings, plus a mortar volume estimate. Works with any unit size — preset defaults follow standard modular brick and 8" block.

Brick & Block Calculator

Concrete & Construction

ft
ft
ft²
in
in
in
in
%

Units needed

1,498bricks/blocks

Net wall area

208 ft² · 19.32 m²

Units per m² / per ft²

73.8/m² · 6.9/ft²

Mortar volume

12.08 ft³ · 342 L

≈ 17.3 × 80 lb mortar bags (0.7 ft³ yield)

Calculation breakdown

  1. 1Net area: 7.92 × 2.44 − 0 openings = 19.32 m²
  2. 2Unit with joint: 0.203 × 0.067 = 0.01355 m²
  3. 3Count: ⌈19.32 ÷ 0.01355 × 1.05⌉ = 1498
  • Structural masonry must follow local building codes — this estimate is for planning only.

Unit with joint = (Length + Joint) × (Height + Joint).

Units = ⌈Net wall area ÷ Unit area with joint × (1 + Waste)⌉.

Mortar volume ≈ Units × (unit area with joint − unit face area) × unit depth.