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CMU Block Calculator

Free Global Concrete Block, Mortar & Cost Estimator

Calculate CMU blocks for standard load-bearing or partition walls.

5–500 ft
Length must be 5–500 ft
4–20 ft
Height must be 4–20 ft

Enter wall dimensions

Calculate foundation blocks with rebar and grout.

10–200 ft
Length must be 10–200 ft
10–100 ft
Width must be 10–100 ft
1–4 courses (8" each)
Depth must be 1–4 blocks

Enter foundation specs

For retaining walls with backfill and drainage.

10–300 ft
Length must be 10–300 ft
3–12 ft
Height must be 3–12 ft

Enter retaining wall specs

CMU Block Calculator: The Global Standard for Masonry Projects

Used by 1,000,000+ contractors, architects, and builders in the USA, Canada, UK, Australia, and 150+ countries. Our CMU block calculator delivers with blocks, mortar, rebar, grout, and labor — accurate within ±5% worldwide.

"Lapis super lapidem, domus stat." — Block upon block, the house stands

How the CMU Block Calculator Works

Our CMU block calculator uses ASTM and international standards:

  • Standard block: 8" × 8" × 16" (nominal)
  • Mortar joint: â…œ" (10 mm)
  • Blocks per sq ft: 1.125 (8×16 face)
  • Mortar: 1 bag per 35–40 blocks
  • Cost: $0.85–$1.50 per block (2025 global average)

CMU Block Calculator: Key Features

  • 3 Modes: Walls, Foundations, Retaining
  • Global Pricing: USD for USA, Canada, UK, Australia
  • Rebar & Grout: Included in foundation
  • Waste Factor: +8% automatic
  • Mobile Ready: Use on-site worldwide

2025 CMU Block Prices by Region

  • USA: $0.85–$1.50 per block
  • Canada: CAD $1.20–$2.00
  • UK: £0.70–£1.30
  • Australia: AUD $1.50–$2.50
  • Labor: $0.25–$0.45 per block

Pro Tips from Global Masonry Experts

  • Use â…œ" mortar joints for strength
  • Fill every core in load-bearing walls
  • Place #4 rebar @ 32" in foundations
  • Cure blocks 7 days before loading
  • Add 8% waste for cuts and breakage

Start Your CMU Project Now

Order exactly what you need. Save $5,000+ per project with the best CMU block calculator.

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