Estimated result
Enter measurements and select Calculate.
Block-count method
Gross wall area includes identical-wall quantity. Openings are subtracted without going below zero. Net area is divided by effective block-face area, allowance is applied, and the result is rounded up.
Effective module boundary
The 16 × 8 inch values are an editable nominal-module example. Enter effective face dimensions including the intended joint module. This is not a complete masonry, mortar, grout, rebar, footing, or structural takeoff.
Worked example
Enter the example values shown in the calculator to review every intermediate area, allowance, and rounded purchase quantity.