Retaining-Wall Calculators
Retaining-Wall Calculator
Estimate Your Retaining-Wall Materials
Retaining walls hold back soil on sloped properties, create level terraces, and define garden beds. The Retaining Wall Calculator estimates interlocking block count, cap blocks, base gravel, drainage backfill, and adhesive from your wall dimensions. Three block sizes are supported.
Retaining wall projects need gravel for the base and drainage backfill — often 2–3 cubic yards for a typical residential wall. The leveled area behind the wall may need topsoil and mulch for landscaping. And for mortared block walls instead of segmental, the Concrete Block Calculator handles CMU estimation.