Retaining Wall Materials for a 25' × 3' Wall
A 25-foot wall 3 ft high is 75 sq ft of face — about 112 standard blocks plus caps and base gravel. Switch the material above for poured concrete, timber, or natural stone.
You'll need
112 blocks
Wall face area
75 sq ft25' long × 3' high
Wall blocks
112Concrete block — standard (≈16×6" face)
Cap blocks
25~12" cap units
Gravel base / backfill
1.3 tons6"-deep leveling base + drainage backfill
Block cost (est.)
$560~$5/block material
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