Crushed Concrete Calculator

1. Identify the Shape of the Area

First of all determine the shape of the area where the crushed concrete will be used. Common shapes include:

• Rectangle
• Circle
• Triangle
• Trapezoid

2. Measure Dimensions

Next step is to measure the dimensions of the selected shape:

For a Rectangle:

• Length (L)
• Width (W)

For a Circle:

• Diameter (D)

For a Triangle:

• Base (B)
• Height (H)

For a Trapezoid:

• Base 1 (B1)
• Base 2 (B2)
• Height (H)

3. Determine the Depth or Height

Measure the depth (D) or Height (H) of the area to be filled with crushed concrete.

4. Calculate the Volume

The volume (V) of the area to be filled can be calculated using the dimensions as we seen in step # 2 and depth as we seen in step # 3. Formulas for different shapes are:

Volume of Rectangle:

V=L×W×D

Volume of Circle:

V=π×(2D)2×Depth

Volume of Triangle:

V=0.5×B×H×Depth

Volume of Trapezoid:

V=0.5×(B1+B2)×H×Depth

5. Apply Compaction Factor

As we know concrete tends to compact when placed. So we need to apply a compaction factor to adjust the volume. For example, a 10% compaction factor increases the volume by 10%.

6. Convert Volume to Desired Units

The last step is to convert the volume to the required measuring unit. So here are the unit conversion formulas for cubic yards, cubic feet, and cubic meters.

Example Calculation

Let’s solve one example for a rectangular area to understand it better:

Let’s assume:

• Length: 10 feet
• Width: 5 feet
• Depth: 1 foot
• Compaction Factor: 10%

1. Volume Calculation:

$V=\text{Length}\times \text{Width}\times \text{Depth}$

          V=10 feet×5 feet×1 foot

$V=50\text{cubic feet}$

        2. Convert Volume to Cubic Yards:

          V=Cubic Feet/27

          V=(50×Cubic Feet)/27

          V=1.85 cubic yards

        3. Apply Compaction Factor:

          V=1.85×1.1=2.04 cubic yards