Retaining Wall Materials for a 15' × 3' Wall
A 15-foot wall 3 ft high is 45 sq ft of face — about 68 standard blocks plus caps and base gravel. Switch the material above for poured concrete, timber, or natural stone.
You'll need
68 blocks
Wall face area
45 sq ft15' long × 3' high
Wall blocks
68Concrete block — standard (≈16×6" face)
Cap blocks
15~12" cap units
Gravel base / backfill
0.8 tons6"-deep leveling base + drainage backfill
Block cost (est.)
$340~$5/block material
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