River-rock cost depends on the exact stone, selling unit, quantity, delivery and installation work. Start with measured area and a suitable depth, then request a local quote. A price per ton cannot be compared directly with a price per cubic yard, and material-only prices are not installed-project totals.
Current supplier examples, not a national average
Checked October 10, 2026: Kern Landscape Resources in the Twin Cities lists its 3/4-inch and 1 1/2-inch river rock at $89 per cubic yard. Kent Countryside in Carmel, New York lists 3/8-inch river rock at $85 per cubic yard and specifies minimum quantities for delivery and pickup.
These US-dollar listings are examples for particular products and sellers. They do not establish a nationwide price range or include every project’s transport, tax or labor. Confirm current availability and a delivered quote before ordering; color, grading and regional supply can change the comparison.
Calculate volume from area and depth
For a reasonably level rectangular area, multiply length by width in feet to get square feet. Divide an irregular layout into smaller shapes and add their areas. Then use:
Cubic yards = square feet × depth in inches ÷ 324.
For example, 200 square feet at 3 inches requires about 1.85 cubic yards geometrically. This is an illustrative calculation, not a recommendation that every stone size or project needs a 3-inch layer. Ask the supplier about appropriate depth and allowances for uneven ground and the selected material.
One cubic yard theoretically covers 162 square feet at 2 inches, 108 at 3 inches, or 81 at 4 inches. Real ordering quantities may include an allowance. Keep that allowance separate so you can see why the order exceeds the geometric result.
Convert to weight only with product-specific information
A ton measures weight; a cubic yard measures volume. Ask the supplier for the bulk density of the exact product rather than assuming every river rock weighs the same. In the United States a short ton is 2,000 pounds; confirm the unit if a quote comes from another market.
If an example supplier specifies 1.4 short tons per cubic yard, 1.85 cubic yards would be about 2.59 short tons. Kent’s listed weight is an example of such a product-specific conversion, not a density to copy to all stone. Bagged products should likewise be compared using the volume or coverage stated on their labels.
Build the full project budget
- Stone quantity multiplied by the quoted price in matching units.
- Delivery, minimum-order charges and any additional loads.
- Removal and lawful disposal of existing material.
- Site preparation, edging and other design-specific materials.
- Equipment, labor and access-related handling.
- Tax and an explicitly identified allowance for uncertain work.
As a worked example only, 2 cubic yards at $89 equals $178 for stone. If a hypothetical delivery quote is $90, that subtotal becomes $268 before tax and other work. Replace both figures with your supplier’s written terms. Do not present an assumed delivery fee as a local market price.
Match stone to the task
Small rounded decorative rock, larger cobbles, beach pebbles and engineered erosion-control material are not automatically interchangeable. View a sample and confirm size, color variation and intended use. A photograph may show wet stone, which can look different from dry material.
For a drainage channel, retaining structure or streambank, obtain an appropriate design rather than selecting only by appearance and price. Loose decorative stone does not by itself solve drainage or structural erosion. Do not assume river rock is a comfortable or accessible walking surface everywhere.
Compare DIY and installed quotes fairly
A delivered pile still has to be moved and spread. Measure gates, slopes and the distance from the permitted unloading point. Ask whether the truck can access the site and who is responsible if hand transport or smaller equipment is needed.
For DIY work, include equipment rental, transport and your practical lifting limits. For a contractor, request the same material, depth, area and preparation scope from each bidder. A cheaper quote may exclude removal, edging or cleanup.
Maintenance belongs in the decision
Rock beds can collect leaves and windblown soil, and weeds may still establish. Plan access for cleanup and future plant changes. Compare the full installation and maintenance needs with other suitable surface treatments before treating river rock as a permanent, maintenance-free solution.
