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How Much Concrete for a 8×12 Porch?

The answer

1.3 cubic yard

For a 8×12 ft porch at 4" depth, with 10% overage included. Estimated cost: $215 at US national average pricing.

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You need

cubic yard

Area
Volume
With 10% overage
Or in 60 lb bag
Estimated cost (US avg)

How we calculated this

  1. 1. Area: 8 × 12 = 96 sq ft
  2. 2. Volume: 96 × (4/12) = 32 cubic feet
  3. 3. Convert + overage: Add 10% for waste → 1.3 cubic yard
  4. 4. Cost: 1.3 × $165.00 ≈ $215

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