Block / CMU Calculator

Count concrete block for a wall. Enter wall length and height to get block count, courses, and mortar bags for standard 8×8×16 CMU.

Wall (8×8×16 CMU)

Wall Length (ft)

Wall Height (ft)

Waste (%)

Openings (ft²)

Doors/windows deducted

Materials

Block Count378

Wall Area320 ft²

Courses12

Mortar (70 lb bags)12

≈1.125 block/ft² and ≈3 bags type-S per 100 block.

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