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French Drain Gravel Calculator

Estimate net French-drain stone volume after pipe displacement, with an optional order allowance.

Inputs

Range: at least 0 ft

Use the planned or measured straight trench length.

Range: at least 0.01 ft

Measure the inside trench width used for the stone takeoff.

Range: at least 0.01 ft

Measure the stone-filled trench depth; use the project detail for any separate bedding or cover.

Range: at least 0 in

Use outside diameter so the displaced pipe volume matches the trench geometry.

Range: at least 0 %

Enter only an allowance supported by the project or supplier; no universal waste factor is assumed.

Result

Stone to order (cu ft)
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Stone to order (cu yd)
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Pipe displacement (cu ft)
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Estimated stone volume (cu yd)
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Gross trench volume (cu ft)
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Estimate scope
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