River Rock Coverage Calculator (1–3" & 3–5" Sizes)
Estimate exact cubic yards and tonnage for smooth landscape river stones in 1–3 inch and 3–5 inch sizing.
Interactive Material & Cost Estimator
HomeYardMath.com — Hardware Store Shopping List
Estimated Material Needed 200 sq ft
Bulk Volume (Cubic Yards) 2.04 55.0 cubic feet
Estimated Total Weight 2.75 US Tons (5,500 lbs)
Store Bag Count 110 bags
Pallet Estimate (56 bags) ~1.96 pallets
Estimated Project Material Cost Best Value
Retail Package Total $547.80 Before local sales tax
Bulk + Truck Delivery $191.08 Includes delivery
Quick Reference Coverage Chart (Gravel & Stone)
Instant pre-calculated material estimates for common US residential project sizes before compaction buffer:
| Typical US Project | Area | Depth | Volume | Weight | Store Bags |
|---|---|---|---|---|---|
| Flower Bed Accent Border (3 ft × 20 ft) | 60 sq ft | 3 inches | 0.68 cu yd | 0.90 tons (1,800 lbs) | 37 bags |
| Dry Creek Bed Drainage (4 ft × 30 ft) | 120 sq ft | 4 inches | 1.63 cu yd | 2.16 tons (4,320 lbs) | 88 bags |
Engineering Formula & Material Density Constant
Cubic Yards = (Length × Width × (Depth ÷ 12)) ÷ 27
Smooth rounded river rock weighs roughly 2,650 lbs per cubic yard. Larger 3–5 inch stones require a slightly deeper bed to prevent soil peek-through.
Choosing the Right River Rock Size
Use 1 to 2-inch river rock for standard garden beds and walkable paths. Use 3 to 5-inch boulders for dry creek beds, erosion control on slopes, and water runoff channels.
Frequently Asked Questions
How many bags of river rock make a cubic yard?
54 standard 0.5 cu ft bags equal 1 cubic yard.
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