How deep should river rock be?

Small river rock often uses 2-3 inches; larger 2-4 inch stone usually needs 4 inches or more for coverage.

Is river rock good for drainage?

Yes when paired with proper grading or drain pipe, especially because rounded stone leaves open voids for water.

A cubic yard of river rock averages about 1.4 tons.

Inputs

Change any field and the results update instantly. Use supplier specs when you have them.

LengthftWidthftDepthinDensitytons/ydPrice per ton$Price unit

Tips & notes

Assumptions that most often change the final quantity in the field—so you order with clearer eyes.

Use larger stone in drainage channels where fast water can move small rock.

Install fabric below decorative river rock to separate soil from stone.

Increase depth for larger rock so the layer looks full and covers fabric.

Keep rock below siding and weep holes to avoid moisture problems.

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