Skip to main content
Skip to main content

🧱 Brick & Masonry Calculator

Calculate bricks, blocks, mortar, and materials needed for masonry projects.

Quick Formula​

Bricks Needed​

Bricks = (Wall Area ÷ Brick Coverage) × Waste Factor

Mortar Needed​

Mortar = Bricks × Mortar per Brick

Standard Brick Sizes​

SizeDimensionsCoverageMortar Joint
Standard8" × 3-5/8" × 2-1/4"7.33 sq ft per 1003/8"
Modular8" × 3-5/8" × 2-1/4"7.33 sq ft per 1003/8"
Queen10" × 3-1/8" × 2-3/4"6.67 sq ft per 1003/8"
King10" × 3-5/8" × 3"6.0 sq ft per 1003/8"

Concrete Block Sizes​

SizeDimensionsCoverageUse
8" × 8" × 16"Standard0.89 sq ftWalls
8" × 4" × 16"Half0.44 sq ftCorners, ends
12" × 8" × 16"Wide1.33 sq ftThicker walls

Common Calculations​

Example 1: Brick Wall​

Wall: 20' × 8' = 160 sq ft Brick: Standard (7.33 sq ft per 100) Waste: 5%

Calculation:

  • Area: 160 sq ft
  • Bricks: (160 ÷ 7.33) × 100 = 2,182 bricks
  • With waste: 2,182 × 1.05 = 2,291 bricks

Mortar:

  • Mortar per 100 bricks: ~8 cubic feet
  • Total mortar: (2,291 ÷ 100) × 8 = 183 cubic feet
  • Bags (80 lb): 183 ÷ 0.6 = 305 bags

Example 2: Block Wall​

Wall: 50' × 8' = 400 sq ft Block: 8" × 8" × 16" (0.89 sq ft each) Waste: 5%

Calculation:

  • Area: 400 sq ft
  • Blocks: 400 ÷ 0.89 = 450 blocks
  • With waste: 450 × 1.05 = 473 blocks

Mortar:

  • Mortar per block: ~0.05 cubic feet
  • Total mortar: 473 × 0.05 = 24 cubic feet
  • Bags: 24 ÷ 0.6 = 40 bags

Mortar Quantities​

Per 100 Bricks​

Joint SizeMortar (cubic feet)
1/4"6-7
3/8"8-9
1/2"10-11

Per Block​

Block SizeMortar (cubic feet)
8" × 8" × 16"0.05
12" × 8" × 16"0.06

Waste Factors​

ApplicationWaste Factor
Simple wall5%
Windows/doors5-10%
Complex layout10-15%
Curved walls15-20%
Account for Openings

Don't forget to subtract window and door openings from your wall area before calculating materials.