🏞️ Retaining Wall Calculator

Wall size and block size

Wall length

Wall height (above ground — add the buried base course below)

Wall block (face size × depth)

Waste allowance (%) (extra for cuts, spills and uneven ground — 10% is the usual rule)

The base trench is figured as wide as the block is deep plus 6 inches, and 6 inches deep. One course of blocks is normally buried for stability — include that course in the height you enter if you want it counted.

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