River Rock Calculator
Estimate landscape river-rock volume from bed dimensions and depth.
Formula and assumptions
Volume estimate; rock size, void space, settling and supplier tonnage conversions vary.
Results depend on the inputs and assumptions shown. Check units and independently verify important decisions.
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Frequently asked questions
How do I calculate river rock for a landscape bed?
Multiply the bed length by width by the desired depth to estimate volume, then convert the units to cubic feet or cubic yards.
What depth should I use?
The right depth depends on rock size, intended coverage, ground conditions and landscaping design. Follow supplier or project guidance rather than assuming one depth fits every bed.
Can I estimate the weight from the volume?
Only with an assumed bulk density. Rock size, material and moisture affect weight, so ask the supplier for its coverage and weight guidance.