What is the difference in quantity between clay bricks, AAC blocks and concrete blocks for the same wall?

AAC blocks are significantly larger than standard clay bricks, so far fewer units are needed to cover the same wall area, while concrete blocks typically sit somewhere between the two depending on the specific size used. This also changes mortar consumption, since fewer, larger units mean fewer joints to fill. Select the correct material type in the calculator before trusting the unit count, since using clay brick assumptions for an AAC block wall will overstate your requirement considerably.