Landscape rock calculator
Estimate landscape rock for beds, borders and ground cover. Returns cubic yards, tons and cost.
Inputs
The formula
cu yd = (L × W × depth/12) ÷ 27. Tons = cu yd × 1.4 (typical rock).
Worked example
20 × 8 ft × 3" = 1.48 cu yd ≈ 2.1 tons.
Frequently asked
›How to calculate how much rock I need for landscaping?
Multiply length × width × depth (in feet), divide by 27 for cubic yards, then multiply by ~1.4 for tons.
›How deep should landscape rock be?
2–3" for decorative use; 3–4" if you want full ground coverage and weed suppression.
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