Cubic Yard Rock Calculator

Instantly calculate how many cubic yards of rock you need, plus tons and cubic feet—free and instant.

  • Free
  • No sign-up
  • Instant results

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How to use it

  1. Enter length in feet
  2. Enter width in feet
  3. Enter depth in inches
  4. Read cubic feet, cubic yards and estimated tons

What it does – The Cubic Yard Rock Calculator takes the length and width of your area (in feet) and the depth of rock you plan to spread (in inches) and instantly converts them to cubic feet, cubic yards, and an approximate weight in US tons. Why it matters – Knowing the exact volume prevents ordering too little, which can delay a project, or too much, which wastes money and space. How to read the results – Cubic feet is the raw volume; divide by 27 to see cubic yards, the unit most suppliers quote. Multiply cubic yards by 1.4 to get the estimated tons, useful for truck load planning. All numbers are shown as decimals you can round as needed for ordering. You can also apply the calculator for patios, garden pathways, or any project where rock fill is required, ensuring you budget accurately.

Pro tips

  • Add 5‑10% extra for compaction and spillage
  • Round up to the nearest whole yard for ordering
  • Compare supplier load limits with your ton estimate
  • Double‑check depth conversion from inches to feet

Real-life examples

  • Planning a new driveway base and need exact rock volume
  • Landscaping a backyard garden path and want to avoid over‑ordering
  • Estimating material for a patio foundation before ordering deliveries

Case study

Mike needed a 10 ft × 12 ft patio base 4 in deep. The calculator showed 1.48 cubic yards ≈2.07 tons, so he ordered just enough rock, saved $150, and started work on schedule.

Frequently asked questions

How do I convert depth from inches to feet?
Divide the inch value by 12; the calculator does this automatically.
Why is the weight shown in tons?
Suppliers quote rock by the ton, and 1 cubic yard of typical rock weighs about 1.4 US tons.
Do I need to round up the cubic yards?
Yes, round up to the next whole yard to ensure you have enough material.
Can I use this for sand or gravel?
The volume conversion works for any material; adjust the weight per yard if needed.
What if my area isn’t a perfect rectangle?
Break the space into rectangles, calculate each, then add the results for total volume.