Gravel Calculator for a French drain (30 ft)
Standard French drain trench.
Calculate Gravel
Common projects
You need
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ton
- Area
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- Volume
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- With 10% overage
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- Or in 0.5 cu ft bag
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- Estimated cost (US avg)
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About this project
A french drain (30 ft) project typically needs gravel at the dimensions pre-filled above. Adjust the inputs to match your exact layout, then use the printable shopping list to order the right quantity. The calculator already factors in 10% overage — the industry standard for gravel.