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Crusher Run Calculator

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The Crusher Run Calculator is an invaluable tool for anyone involved in construction, landscaping, or any project requiring a solid foundation. It simplifies the process of calculating the amount of crusher run needed to cover a certain area at a specific thickness. Crusher run, a mixture of crushed stone and stone dust, is commonly used as a base for driveways, paving stones, and under concrete slabs. This calculator ensures that users can accurately determine how much material they need, reducing waste and ensuring a solid foundation for their project.

Purpose and Functionality

The primary function of the Crusher Run Calculator is to estimate the amount of material needed for a project. It uses simple yet essential formulas to calculate the volume of crusher run required and then converts this volume into weight, considering the material's density. This conversion is crucial because crusher run is sold by weight, not by volume.

To use the calculator, inputs such as the length and width of the coverage area, the desired thickness of the crusher run layer, and the material's density are needed. These inputs allow the calculator to perform two main calculations:

  1. Calculate Volume: This is the first step, where the calculator determines the volume of material needed by multiplying the area of the project by the desired thickness.
  2. Convert Volume to Weight: Given the volume, the calculator then uses the density of the crusher run to convert this volume into weight, the measurement most suppliers use for selling.

Step-by-Step Example

Let's go through a practical example of using the Crusher Run Calculator:

  • Project Area: Suppose you want to lay crusher run on a driveway that is 100 square feet.
  • Desired Thickness: You decide on a thickness of 3 inches for a sturdy base.
  • Density of Material: The crusher run you're using has a density of 150 lbs/ft³.


  1. Convert Thickness to Feet: Since the calculator needs consistent units, you convert the thickness from 3 inches to feet. 3 inches is equivalent to 0.25 feet (since 3 divided by 12 equals 0.25).
  2. Calculate Volume: Multiply the area (100 sq ft) by the thickness in feet (0.25 ft) to get a volume of 25 cubic feet.
  3. Convert Volume to Weight: Multiply the volume (25 cubic feet) by the density (150 lbs/ft³) to get the total weight of crusher run needed, which is 3,750 lbs.

Information Table

To further simplify, here's a table with common densities and conversions you might need:

MaterialDensity (lbs/ft³)Conversion (Inches to Feet)
Crusher Run1501 inch = 0.0833 feet
Sand1002 inches = 0.1666 feet
Gravel1203 inches = 0.25 feet


The Crusher Run Calculator is a simple yet powerful tool that ensures you purchase the right amount of material for your project, avoiding unnecessary excess or shortages. By inputting the dimensions of your project area and the desired thickness of the crusher run layer, you can swiftly determine the volume and weight of the material needed. This calculator not only saves time and reduces waste but also contributes to a more efficient and cost-effective project planning process. Whether you're a professional contractor or a DIY enthusiast, incorporating this calculator into your planning toolkit will help ensure your projects are built on a solid foundation.

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