How Much Concrete for a 20×24 Slab?
The answer
6.52 cubic yard
For a 20×24 ft slab at 4" depth, with 10% overage included. Estimated cost: $1,076 at US national average pricing.
Calculate Concrete
Common projects
You need
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cubic yard
- Area
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- Volume
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- With 10% overage
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- Or in 60 lb bag
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- Estimated cost (US avg)
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How we calculated this
- 1. Area: 20 × 24 = 480 sq ft
- 2. Volume: 480 × (4/12) = 160 cubic feet
- 3. Convert + overage: Add 10% for waste → 6.52 cubic yard
- 4. Cost: 6.52 × $165.00 ≈ $1,076