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Construction Estimation10 min readBy HaseebSoft Estimation Team

Concrete Estimation Guide for US Contractors: Foundations, Flatwork & Structures

Concrete is one of the most cost-sensitive line items in any construction estimate. Errors in concrete quantity calculations compound through rebar, formwork, and labor costs.

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Concrete Estimation: The Foundation of Accurate Bidding

Concrete Volume Calculations

Slab-on-Grade:

Volume (CY) = Length × Width × Thickness ÷ 27

Example: 100' × 50' × 4" = 100 × 50 × 0.333 ÷ 27 = 61.7 CY

Always add 5-10% for waste and topping irregularities.

Footings:

Volume = Total Linear Footage × Width × Depth ÷ 27

Columns:

Volume = π × radius² × height × quantity

Concrete Pricing (2026 National Averages)

  • Ready-mix concrete: $145-175/CY (delivered)
  • High-strength (5,000 PSI): $165-200/CY
  • Fiber-reinforced: $165-195/CY
  • Rebar Estimation

  • Typical slab reinforcement: 0.5-1.0 lbs/SF
  • Typical footing reinforcement: 2-4 lbs/LF
  • Rebar price: $0.80-1.20/lb (current market)
  • Labor Costs

  • Form setting: $6-12/SF of formed area
  • Concrete placement and finishing: $4-8/SF
  • Curing and protection: $0.50-1.00/SF
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