FullCalculator

French Drain Gravel Calculator

French Drain Gravel

Calculate gravel needed for a french drain installation.

Formula

Tons = (Length x Width x Depth / 12^2) / 27 x 1.4

Frequently Asked Questions

What type of gravel is best for french drains?
Use washed 3/4 inch crushed stone or river rock for best drainage.
How deep should a french drain be?
A french drain should be 18 to 24 inches deep for proper function.

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