Rock Calculator
Estimate the weight, volume, and cost of rocks for landscaping or construction projects.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Rock Calculator
This calculator estimates the volume, weight, and cost of rock needed for a project. All inputs are in imperial units (feet, inches, pounds).
- Enter Length and Width (in feet) – the area dimensions.
- Enter Depth (in inches) – how thick the rock layer will be.
- Select Rock Density – choose from common rock types (Granite ~100, Limestone ~120, etc.).
- Enter Cost per Ton (in dollars) – the price per 2,000 lbs of rock.
- Click Calculate – results show volume (ft³), weight (tons), and total cost.
Tip: All fields must be positive numbers. The formula explanation below the results shows the step-by-step math.
Previous Results
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Frequently Asked Questions
Enter the length, width, and depth of the area you want to fill with rocks. Select the rock type for density, and enter the cost per ton. Click Calculate to see the volume, weight in tons, and total cost.
Granite is about 100 lbs/ft³, limestone 120, sandstone 140, and basalt 160. These values are approximate and can vary.
Yes, you can manually enter a custom density if your rock type is not listed. The calculator uses the selected density for weight calculation.