Retaining Wall Calculator

Calculate the exact number of retaining wall blocks, capstones, and drainage gravel needed for your project. Includes proper setback calculations for stability.

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Wall Length (feet)

Wall Height (feet)

Block Size

Wall Pattern

Drainage Gravel Depth (inches)

Waste Factor (%)

Materials Needed

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Retaining Wall Best Practices

Proper retaining wall construction requires:

Foundation: Excavate and compact base material below frost line.
Drainage: Install gravel behind wall with perforated pipe.
Setback: Each course should step back 1-2 inches for stability.
Capstones: Top course should be solid caps for finished look.

Tip: Check local codes - walls over 4 feet may require engineering.