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How Much Gravel for a 5×10 French drain?

The answer

2.04 ton

For a 5×10 ft french drain at 12" depth, with 10% overage included. Estimated cost: $112 at US national average pricing.

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Area
Volume
With 10% overage
Or in 0.5 cu ft bag
Estimated cost (US avg)

How we calculated this

  1. 1. Area: 5 × 10 = 50 sq ft
  2. 2. Volume: 50 × (12/12) = 50 cubic feet
  3. 3. Convert + overage: Add 10% for waste → 2.04 ton
  4. 4. Cost: 2.04 × $55.00 ≈ $112

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