Why do AAC blocks need fewer units than clay bricks for the same wall area?

AAC blocks are manufactured at a much larger standard size than clay bricks specifically to reduce the number of joints and speed up wall construction, which is part of why they are popular on modern Bangalore sites despite a higher per-unit cost. Fewer units also means less mortar consumption and often faster plastering, since there are fewer joints to fill. The calculator accounts for this size difference directly when you select block type.