CMU Wall Design Calculator
Calculate concrete masonry unit (CMU) block count, rebar, grout, and mortar for a block wall.
Inputs
ft
ft
in
in
sq ft
Results
Blocks Required
180 blocks
Vertical Rebar Bars6 bars
Grout Needed0.07 cu yd
Mortar Bags (80 lb)6 bags
Estimated Material Cost$568.08
How to Use This Calculator
- Enter the wall height and length in feet.
- Select the CMU block size (8, 10, or 12 inches wide).
- Input the mortar joint thickness (typically 3/8 inch).
- Review the block count, grout volume for filled cells, and vertical rebar spacing.
- Consult a structural engineer before building load-bearing CMU walls.
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