Rip Rap Calculator

Calculate the amount of rip rap stone needed for erosion control and slope protection.

Project Dimensions

Length (ft) (ft)

Width (ft) (ft)

Depth (in) (in)

Density (lb/yd³) (lb/yd³)

Material Estimate

Enter dimensions to calculate rip rap needs

Overview

Rip rap is large, angular stone used to protect soil from erosion in areas of high concentrtated runoff or wave action. This calculator helps you determine the weight and volume of stone required based on your area dimensions.

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Pro Tips

Always use a geotextile filter fabric under rip rap to prevent the underlying soil from washing out.
The depth should be at least 2 times the maximum stone diameter.
Add 5-10% to your estimate to account for settling and voids between stones.

Fun Facts

"Rip rap is typically made from granite, limestone, or recycled concrete."
"The angular shape of rip rap helps lock stones together, creating a stable surface."
"Standard density for rip rap is approximately 2,500 lbs per cubic yard."

Formula: Volume (yd³) = [Length (ft) × Width (ft) × (Depth (in) / 12)] / 27 Weight (Tons) = [Volume (yd³) × Density (lb/yd³)] / 2,000

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