About River Rock Calculator
We build a clear, honest river rock calculator and a set of guides that help homeowners and contractors order the right amount of stone the first time.
Why we built this
Ordering landscape stone is deceptively easy to get wrong. Suppliers sell by the cubic yard or the ton, projects are measured in feet and inches, and depth quietly changes everything. Order short and you're making a second trip; order long and you've paid for stone you don't need. We built RiverRockCalculator.com to remove that guesswork — enter your area and depth, and get cubic yards, tons, bags, and an honest cost estimate in one place.
Just as important to us is showing our work. A lot of calculators hand you a number with no explanation. We publish the exact formulas and density values we use, present cost as ranges rather than false-precision single figures, and tell you plainly when something varies by region or supplier.
How we research our data
Our density, coverage, and cost figures are compiled from published landscape-material references and supplier pricing, then cross-checked against multiple sources rather than taken from any single vendor. Stone density genuinely varies by size, type, and moisture, so where sources disagree we use a representative mid-range value and disclose it. The full reference — including the density of every rock type the calculator supports — lives on our methodology page, which we date and revisit on a regular cadence.
What you'll find here
Alongside the calculator, we maintain guides on river rock sizes, cost per yard, ton and bag, types of river rock, and common projects like dry creek beds, stone around trees, and drainage. Each one is written to answer a real question, not to pad the site.
Get in touch
Spotted a figure that looks off for your area, or have a suggestion? We genuinely welcome corrections that improve the defaults for everyone. Reach us through the contact page or at contact@riverrockcalculator.com.
River Rock Calculator provides estimates for planning purposes only. Always confirm final quantities and pricing with your supplier. See our terms for details.