Home Calculators River Rock Calculator

River Rock Calculator

Calculate how many tons, cubic yards, and bags of river rock you need — with cost estimates, depth guidance, multi-zone support, and a full material breakdown.

River rock ≈ 1.35 tons/yd³  ·  Decorative: 2–3" depth  ·  Drainage: 6–12"

Coverage Area & Depth

Dimensions of the area you want to cover

Rock Type & Density

Choose a rock type or enter a custom density

Pricing (Optional)

Enter pricing to get total cost estimates

Multi-Zone Calculator

Add multiple areas with different shapes or depths

Quick Presets

Common river rock project setups

Summary

tons
Cubic Yards
Tons
Cubic Feet
Pounds
Bags Needed
Coverage Area

Rock Type Guide

Small (1–3")1.35 t/yd³
Medium (3–5")1.40 t/yd³
Large (5–8")1.45 t/yd³
Pea Gravel1.30 t/yd³
Lava Rock0.85 t/yd³

Depth Reference

Decorative2–3"
Pathway3–4"
Drainage6–12"
Dry River Bed4–6"