Calculate how many concrete cinder blocks you need for your wall, including mortar bags and waste.
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Estimated Mortar Bags (80 lb)
Planning a masonry project? Our cinder block calculator helps you determine exactly how many concrete masonry units (CMUs) you need for your wall. It automatically factors in the standard 3/8-inch mortar joint.
Never run out of materials mid-project. Along with block count, our calculator estimates the number of 80 lb mortar bags required and automatically adds a 5% waste factor to account for breakages and cuts.