### Concrete Block Calculator - Easily calculate concrete ...

Here is how you can calculate the amount of block needed the old fashioned way using a pencil and paper: How to calculate concrete blocks needed: 3 Bags Mortar per 100 Block (35 Block per Bag) 1000 Ib. Sand per 100 Block 1.125 Block per sq.ft. of Wall Area 75% of Wall Length give Block per Course Number of Courses = 1.5 X Height of wall

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