Volume & Weight

    Gravel Depth Calculator

    Two questions in one tool. Pick an application and it tells you the correct depth and the quantity to order. Or enter the amount of stone you already have and it tells you how deep you can spread it across your area.

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    What you'll need

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    Prices as of Sep 25, 2026, 6:18 PM UTC. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

    Get the Gravel & Stone Calculator app for Android

    Estimate gravel, stone, sand, and mulch on the job site, save projects, and share quantities with your supplier.

    Building something else? Try our sister calculators

    Frequently asked questions

    How deep should gravel be?
    Two inches for decorative beds, two to three for paths, four to six for patio and shed bases, and eight to twelve for a new driveway built in layers.
    Can gravel be too deep?
    Yes. More than about three inches of loose stone on a walking surface is unpleasant to walk on and unstable underfoot. Depth belongs in the compacted base, not the surface course.
    How thick should each compacted layer be?
    No more than four inches per lift, and two inches is better. A plate compactor simply cannot densify a deeper layer all the way through.

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