Landscape rock calculator
Estimate landscape rock for beds, borders and ground cover. Returns cubic yards, tons and cost.
Short answer: cu yd = (L × W × depth/12) ÷ 27. Tons = cu yd × 1.4 (typical rock). 20 × 8 ft × 3" = 1.48 cu yd ≈ 2.1 tons. Enter your measurements above and the landscape rock calculator returns the quantity, unit conversions and an estimated cost instantly, in imperial or metric — no sign-up needed.
What do you need to measure?
What is the answer?
How does the landscape rock calculator work?
cu yd = (L × W × depth/12) ÷ 27. Tons = cu yd × 1.4 (typical rock).
What does a worked example look like?
20 × 8 ft × 3" = 1.48 cu yd ≈ 2.1 tons.
What do people ask most?
›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.
Which yard & landscape calculator should you use next?
Where can you learn more?
Read field notes on estimating and materials, or browse every calculator we make.