Home Back

Rip Rap Stone Calculator

Rip Rap Volume Equation:

\[ Volume = \frac{Length \times Width \times (Depth / 12)}{27} \]

feet
feet
inches

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is Rip Rap Stone?

Rip rap stone is loose stone used to form a foundation or lining for erosion control, slope stabilization, and channel flow control. It's commonly used in shoreline protection, bridge abutments, and drainage areas.

2. How Does the Calculator Work?

The calculator uses the volume equation:

\[ Volume = \frac{Length \times Width \times (Depth / 12)}{27} \]

Where:

Explanation: The equation converts depth from inches to feet (dividing by 12) and then converts cubic feet to cubic yards (dividing by 27).

3. Importance of Volume Calculation

Details: Accurate volume calculation is crucial for determining the amount of rip rap needed for a project, which affects both cost estimation and project planning.

4. Using the Calculator

Tips: Enter length and width in feet, depth in inches. All values must be positive numbers. The result will be in cubic yards, the standard measurement for bulk materials.

5. Frequently Asked Questions (FAQ)

Q1: What size is rip rap stone?
A: Rip rap typically ranges from 4 inches to 2 feet in diameter, with specific sizes chosen based on the application and expected water flow.

Q2: How much does rip rap stone weigh?
A: Weight varies by stone type, but generally ranges from 1.2 to 1.8 tons per cubic yard.

Q3: How thick should rip rap be?
A: Thickness typically ranges from 6-24 inches depending on application and expected forces. Consult engineering specifications for your project.

Q4: What's the difference between rip rap and gabion?
A: Rip rap is loose stone, while gabions are stone contained in wire baskets or mesh containers.

Q5: How do I account for slope in my calculations?
A: For sloped surfaces, use the horizontal projection for length/width and consider increasing depth on steeper slopes.

Rip Rap Stone Calculator© - All Rights Reserved 2025