SUMIF is a useful formula to know how to use when creating Microsoft Excel spreadsheet templates. An example I can give is from the world of engineering. Say you have to create a part list or a bill of material (BOM for an assembly, such as a snow blower. The snow blower has multiple parts with have standard parts, such as washers, bolts, nuts, etc,, attached to it. At the bottom of my BOM I want to sum all of the parts for my top level assembly but I don’t want to include the number of standard nuts and bolts. In this case I use the SUMIF formula along with some nifty formatting.
To count the number of parts in a specified column use the =SUMIF() formula. In my case, =SUMIF(K5:K17,">0").