Estimate how many tons of river rock your landscaping needs. Each dimension has its own unit (in/ft/yd/m), and the material dropdown sets the density automatically.
| Area | Shape | Length | Width | Dia | Depth | Cu Yd |
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Measure each area, divide the volume by 27 for cubic yards, and multiply by the density. River rock and 2-6 inch rock run lighter per yard than crushed stone because of the gaps between stones - the material dropdown sets a typical value. Switch any field's unit as needed.
Use the river rock calculator for decorative beds, drainage swales, dry creek beds and landscape borders. It estimates cubic yards and tons using a density suited to larger rounded stone.
Start with the calculator that matches how your material is sold: area, length, volume, count, weight or electrical load. Enter one work area at a time, use the unit selector beside each measurement, then review the order quantity and cost fields before comparing supplier quotes.
Most calculators can save the current estimate in your browser, reload named estimates, print a copy, switch to dark mode or create a shareable link. Those tools are intended for planning and communication; always confirm final quantities, coverage rates, density, code requirements and pricing with the supplier or contractor responsible for the work.