River Rock Calculator

Your details

Each rock type has a different bulk density. Select "Custom density" to enter your own.
Length of the area to be covered.
ft
Width of the area to be covered.
ft
Recommended: 2-3 inches for decorative use, 4-6 inches for drainage or dry creek beds.
in
Add 10% for standard projects, 15-20% for irregular shapes or steep slopes.
%
Enter the supplier price per ton to calculate total material cost. Leave at 0 to skip.
USD/ton
If buying bagged rock, this shows how many bags you need.
Volume needed
0.98yd³

Total cubic yards of river rock including waste buffer

Volume (cubic feet)26.4ft³
Weight (tons)1.32tons
Weight (pounds)2,640lb
Coverage area96ft²
Bags needed53bags
Volume (yd³)0.98
Weight (tons)1.32

You need about 0.98 yd³ (1.3 tons) of river rock.

  • You need approximately 0.98 cubic yards (1.32 tons) of river rock including your waste allowance.
  • For projects under 5 cubic yards, many suppliers have a minimum delivery charge. Ordering a small overage may reduce the per-yard cost.
  • At these settings your rock covers about 73 sq ft per ton.
  • River rock does not compact like soil, so the ordered volume is the installed volume. Order at least 5-10% extra for settling and edge overage.

Next stepConfirm the bulk density with your supplier before placing a large order. Density varies by rock size and source, and the difference of 0.1 tons/yd³ can shift your total cost by 5-8%.

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