River rock calculator
PROEstimate river rock in cubic yards, tons and cost.
Inputs
Result
Cubic yards
1.85
Tons
2.69
≈ 1.45 t/yd³
Est. cost
$121
The formula
cu yd = (L × W × depth/12) ÷ 27. Tons = cu yd × 1.45.
Worked example
20 × 10 ft × 3" = 1.85 cu yd ≈ 2.68 tons.
Frequently asked
›What depth for river rock?
2–3" for decorative use; 4–6" for base or heavy traffic.