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Concrete Block Calculator

Estimate CMU blocks, mortar bags, and costs for wall construction.

The concrete block calculator estimates courses, blocks per course, mortar bags, and total cost for CMU walls. Input wall dimensions, block size, and joint thickness to generate a precise material list. It's built for both estimating and field verification before a delivery.
  • Standard CMU mortar joints are 3/8 inch — deviating from this changes your block count per course.
  • Order mortar bags with 10% overage; mixing ratios vary by temperature and joint size.
  • Stack bond patterns require more precise block cutting — add 5% waste beyond the default.
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