RETAINING WALL
WALL BLOCK COUNT
blocks = (L÷blkL) × (H÷blkH)
ft
ft
RESULT
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FILL IN ABOVE
Walls over 4 ft of exposed height typically require engineered design and a permit. This calculator handles unreinforced gravity walls only. Verify local code before building.
About this calculator
This retaining wall calculator estimates the segmental concrete blocks, cap blocks, and cubic yards of base gravel needed for a small landscape retaining wall. Enter the wall length and finished height, pick a block size sold at your local home center, and the calculator returns full courses plus caps and the leveling pad gravel. Walls under 4 feet of exposed face are typically gravity walls a homeowner can build over a weekend; anything taller usually requires geogrid soil reinforcement and engineered design per local code.