How to use it
- Enter length in feet.
- Enter width in feet.
- Enter depth in inches.
- Read cubic yards, cubic feet, and tons results.
What it does – The Drainage Rock Calculator converts the dimensions of a trench (length, width, depth) into three practical measures: cubic yards, cubic feet, and an approximate weight in US tons.
Why it matters – Knowing the exact volume prevents over‑ordering, which saves money and reduces waste, while the weight estimate helps you verify delivery limits and labor requirements.
How to read the results – Cubic yards is the standard unit for ordering bulk rock. Multiply that number by 1.4 to see the tons (approx), the typical weight used by suppliers. Cubic feet gives a finer view for small projects or when comparing to other materials. No sign‑up, no cost – just instant numbers to plan your landscape confidently.
Pro tips
- Add 5‑10% extra volume for compaction and spillage.
- Round up to the nearest 0.1 cubic yard for easier ordering.
- Check supplier load limits using the ton estimate before placing an order.
- Enter depth in inches; the calculator handles the conversion automatically.
Real-life examples
- A homeowner planning a new French drain needs to know how much rock to order.
- A landscaper estimating material for a garden retaining wall trench.
- A contractor preparing a backyard patio slope wants to avoid costly over‑order.
Case study
Maria entered a 12 ft × 8 ft × 6 in trench and the calculator showed 1.33 cubic yards, 1.86 tons (approx) and 36 cubic feet, letting her order the exact amount and save $150 on excess rock.