Construction Calculator
River Rock Calculator
Estimate river rock cubic yards, tons, material cost, delivery, and coverage for landscaping beds, dry creek beds, drainage zones, borders, walkways, and decorative ground cover.
River Rock Calculator
Estimate river rock cubic yards, tons, and cost
Calculate river rock for landscaping beds, dry creek beds, drainage areas, decorative borders, walkways, and ground cover.
Common river rock depths
Results
River rock needed
1.63 yd³
2.2 tons estimated
River rock is often decorative and may cost more than common gravel. Confirm stone size, density, minimum delivery, and color availability with your local supplier.
How to calculate river rock
River rock is estimated by volume first, then converted into tons for ordering. Measure the area, choose an installed depth, convert inches to feet, calculate cubic feet, divide by 27 for cubic yards, then multiply by tons per cubic yard.
Area
Length × Width
Cubic Feet
Area × Depth in Feet
Cubic Yards
Cubic Feet ÷ 27
Estimated Tons
Cubic Yards × Tons Per Cubic Yard
Common river rock depths
Best uses for river rock
Dry creek beds
River rock is commonly used to create decorative drainage swales and dry creek bed features.
Landscaping beds
Smooth rounded rock creates a finished landscape look around shrubs, trees, and low-maintenance beds.
Drainage areas
River rock can help control splash, runoff, and erosion when installed over proper fabric and base preparation.
Decorative borders
Use river rock along walkways, patios, foundations, and planting borders for clean visual separation.
Walkway accents
River rock can border paths or fill low-traffic decorative zones, though it may shift under foot traffic.
Ground cover
It helps reduce mud, improve appearance, and create durable exterior coverage areas.
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River rock calculator FAQ
How do I calculate how much river rock I need?
Multiply length by width to get square feet, multiply by depth in feet to get cubic feet, divide by 27 to get cubic yards, then add waste and convert to tons.
How deep should river rock be?
Use about 2 inches for decorative cover, 3 inches for landscape beds, 4 inches for dry creek beds, and 4 to 6 inches for some drainage areas.
How much does a cubic yard of river rock weigh?
River rock commonly weighs about 1.3 to 1.5 tons per cubic yard, but supplier density can vary by stone size and moisture.
Is river rock good for drainage?
River rock can work well in decorative drainage areas, dry creek beds, and runoff zones, but proper slope, fabric, base preparation, and outlet design still matter.