French Drain Trench Excavation, Gravel Tonnage, Perforated Pipe & Geotextile Estimator
Calculate sub-surface groundwater drainage trench dimensions: washed crushed drainage stone tonnage, 4" perforated drain pipe, and non-woven geotextile filter fabric roll area.
Total Washed Drainage Gravel (Metric Tons)
Calculator Inputs
Total Washed Drainage Gravel (Metric Tons)
Non-Woven Geotextile Fabric Area (m²)
Total Trench Excavation Volume (m³)
Gravel Net Trench Volume
Geotextile Rolls (50 m² ea)
French Drain Components Breakdown
Non-woven needle-punched geotextile fabric (4-6 oz) is mandatory to prevent fine silt from clogging the drainage gravel voids.
All engineering calculations, structural estimates, and electrical sizing metrics are provided for preliminary estimation only. Always ensure compliance with relevant statutory building codes and occupational safety standards, verified by a certified professional engineer before practical implementation.
Calculation Methodology
Gravel Volume = (Length * Width * Depth) - Pipe Volume. Gravel Weight (Tons) = Gravel Vol * 1.55 t/m³ * 1.05. Geotextile Area = Length * (Width + (2 * Depth) + 0.3m overlap).
Frequently Asked Questions
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