Enter wall dimensions, pick block size and core-fill spacing, add bond-beam courses blocks, mortar, grout, and rebar price themselves live.
Nominal 8″ × 16″ face with ⅜″ joints ≈0.89 sq ft per block for every width.
Core grout fill
Hollow wall · solid core ≈ 0.32 cu ft per 8″ block (CMHA).
CMU blocks to order
378
BLOCKS
Bill of materials+5% waste
CMU block 8×8×16″
≈112.5 blocks / 100 sq ft · 320 sq ft wall
Net 360 ea · Waste +5%
Type S mortar 80-lb bags
1 bag per 15 blocks
Net 13 bags · Waste +10%
Core-fill grout
No grout specified
Net 0 cu yd · Waste —
Cost projection
Saved on this device · No account · No cloud
Total · $1,333.80
378 blocks
A standard 8×16 in block face covers 0.8889 sq ft, so a wall needs about 112.5 blocks per 100 sq ft before waste the same for 6, 8, and 12 in widths.
Enter wall dimensions, pick block size and core-fill spacing, add bond-beam courses blocks, mortar, grout, and rebar price themselves live.
Type S mortar runs about 1 eighty-pound bag per 30 blocks. The 10% default waste covers joints, cuts, and spills.
Cores sit on 8 in centers, so grouting every 24 in O.C. fills every 3rd core, 32 in O.C. every 4th, and 48 in O.C. every 6th. A solid-grouted 8×8×16 block holds about 0.16 cu ft of grout.
Bond-beam courses are grouted solid along their full length with 2 continuous bars counted in 20-ft sticks.
Blocks = wall sq ft ÷ 0.89 → +waste
A standard 8×16 in block face covers 0.8889 sq ft, so plan on about 112.5 blocks per 100 sq ft. A 40×8 ft wall (320 sq ft) needs 360 blocks net — order 378 with 5% waste for cuts and breakage.
About 1 bag of Type S mortar per 30 blocks — roughly 3.5 bags per 100 blocks, or 4 with 10% waste. A 378-block wall needs about 14 bags.
A solid-grouted 8×8×16 block holds about 0.16 cu ft. Cores sit on 8 in centers, so grouting every 24 in O.C. fills every 3rd core, 32 in O.C. every 4th, and 48 in O.C. every 6th.
Divide wall square footage by 0.8889 (the face area of one block), then add waste — 5% is the default for cuts and breakage.
Bond-beam courses are grouted solid along their full length with 2 continuous bars, counted in 20-ft sticks.
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