Enter length and exposed height, pick block face size blocks, caps, drainage tons, and geogrid update live.
SRW blocks to order
221
BLOCKS
Bill of materials+5% waste
SRW wall block 6″×16″ face
3.5 ft total height incl. buried course
Net 7 courses × 30/course · Waste +5%
Wall cap units
One per block on the top course
Net 30 ea · Waste +5%
Drainage stone ¾″ crushed
1.4 tons per cu yd
Net 12″ column × 3 ft · Waste —
Base leveling pad crusher run
Compacted pad under first course
Net 6″ deep × 24″ wide · Waste —
Geogrid reinforcement
Walls over 4 ft exposed need grid + engineered design
Net Not required · Waste —
Cost projection
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Total · $1,624.55
221 blocks
Total height = exposed height + buried base courses (default 1). Courses round up: a 3.2 ft wall in 6-in block needs 7 courses.
Enter length and exposed height, pick block face size blocks, caps, drainage tons, and geogrid update live.
Drainage stone is a 12-in-wide column of ¾-in crushed stone behind the full exposed height at 1.4 tons per cubic yard, plus a 6×24-in crusher-run leveling pad under the first course.
Walls over 4 ft exposed trigger geogrid: one layer every 2 courses, embedded 0.7 × wall height. Anything over 4 ft needs an engineer-stamped design in most jurisdictions.
Blocks = courses × blocks/course → +waste
A 40x3 ft wall in 6x16 in block needs 7 courses (3 ft exposed + 1 buried 6-in course = 3.5 ft ÷ 0.5 ft) × 30 blocks per course = 210, plus 5% waste = 221 blocks. Add 32 cap units.
Segmental walls over 4 ft of exposed height need geogrid reinforcement — typically one layer every 2 courses, embedded back 0.7 times the wall height. Most codes also require an engineered design above 4 ft.
Plan a 12-in-wide column of 3/4-in crushed stone behind the full exposed height. A 40x3 ft wall needs about 2.5 tons at 1.4 tons per cubic yard, plus base-pad rock.
Total height = exposed height + buried base courses (default 1). A 3 ft exposed wall in 6-in block is 3.5 ft ÷ 0.5 ft = 7 courses, since courses always round up.
Blocks = courses × blocks per course, then add waste. Courses = ceiling(total height ÷ block height); blocks per course = ceiling(wall length ÷ block length).
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