To build an email address from a first and last name, you can use a formula based on simple concatenation with help from the LEFT and LOWER functions.

In the example shown, the formula in D5 is:


Generic formula



Working from the inside out, this formula first concatenates the last name in column C with the first letter of the first name from column B:


The LEFT function is normally configured with num_chars, but the argument is optional and left will extract 1 character from the left when it is absent. This results in the text string "atanaka".

Next, the domain name is added like this:


Note that the reference to the domain name is absolute ($G$6) so that the formula can be copied down the table without this reference changing.

Finally, the lower function is used to lowercase the entire string:


which returns a final result of ""

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Dave Bruns

Hi - I'm Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.