French Drain Calculator
Calculate the materials needed for a French drain installation including gravel, perforated pipe, and landscape fabric. Get cubic yards, tonnage, and cost estimates for your project.
Typical: 8-12 inches
Typical: 12-24 inches
Materials Needed
Gravel
2.6
cubic yards
Gravel Weight
3.5
tons
Pipe
56
linear feet
Landscape Fabric
250
sq ft
Estimated Material Costs
| Item | Quantity | Unit Price | Cost |
|---|---|---|---|
| #57 Washed Stone (3/4") | 3.5 tons | $45/ton | $159 |
| 4" Perforated Pipe | 56 ft | $1.10/ft | $62 |
| Landscape Fabric | 250 sq ft | $0.15/sq ft | $38 |
| Total Material Cost | $258 | ||
Material prices are estimates and vary by region. Does not include labor, equipment rental, or excavation costs.
How to Use This Calculator
Enter the trench length in feet and the width and depth in inches. Select your gravel type and pipe diameter. The calculator figures out the cubic yards of gravel, linear feet of pipe, square footage of landscape fabric, and provides a material cost estimate.
Formula Used
Trench Volume = Length x (Width/12) x (Depth/12) cu ft. Gravel Volume = Trench Volume - Pipe Volume. Cubic Yards = Cu Ft / 27. Tons = (Cu Ft x Density) / 2000. Fabric = (Bottom + 2 Sides + Overlap) x Length.
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Disclaimer
This calculator is for estimation purposes only. Results may vary based on local conditions, materials, and building codes. Always consult a licensed professional before making decisions based on these calculations. MyContractorTools is not responsible for any errors or omissions.