Landscape Rock Calculator
Calculate the amount of landscape rock needed for your project. Enter the area dimensions and depth to estimate cubic yards and tons.
Published by:
isCalculator Editorial Team
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How to use this tool?
This calculator estimates the amount of landscape rock needed for a project in both cubic yards and tons. All measurements must be entered in feet and inches (imperial units). Rock density defaults to 100 lbs/cu ft (adjustable).
- Select Shape – Choose Rectangular, Circular, or Triangular from the dropdown.
- Enter Dimensions – Based on the shape, fill in the required fields (e.g., Length & Width for rectangle, Radius for circle, Base & Height for triangle). All values must be in feet.
- Enter Depth – Type the desired rock depth in inches (e.g., 3 for a 3-inch layer).
- Adjust Density (optional) – The default rock density is 100 lbs per cubic foot. Change it if your rock type differs.
- Click Calculate – The result shows the approximate volume in cubic yards and weight in tons. A step-by-step formula breakdown is provided below the result.
Tip: Ensure all inputs are positive numbers. If you see an error, check that required fields are filled and values are greater than zero.
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Frequently Asked Questions
For rectangular areas, measure length and width in feet. For circular areas, measure the radius. For triangular areas, measure the base and height.
Typical depths range from 2 to 4 inches for decorative purposes. For pathways, 3 inches is common. Adjust based on your project.
Common densities vary: 100-120 lbs/cubic ft for most gravel and rock. The default is 100. Check with your supplier for exact density.