Retaining Wall Calculator
Estimate blocks, backfill, drainage gravel, and adhesive for retaining walls.
The retaining wall calculator estimates block courses, cap blocks, adhesive tubes, backfill, and drainage gravel for segmental retaining walls. It supports standard and large-cap block profiles so you can order accurately. Use it for both estimating material cost and planning your delivery schedule.
- Walls over 4 feet tall typically require an engineer's stamp — check local code before starting.
- Install drain tile at the base of the wall behind the first course to prevent hydrostatic pressure buildup.
- Set each course back 1 inch from the one below for a batter that increases stability.
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