Learn Excel Formulas and Functions

Excel offers over 300 functions and formulas to help you get more out of your spreadsheets. This page contains a summary of the functions that are covered by lessons on this site. It's being added to all the time, so check back often!

There are many scenarios where you may need to use the current date and time in your spreadsheets. You may simply need to display the current date in a spreadsheet report. Or, you may need to perform a calculation that uses the current date or time. This lesson shows you how to enter a formula into a cell in Excel that outputs the current date and/or time, and updates automatically as time passes.


The SUM function in Excel allows you to add up the values in a range of cells. However, sometimes you only want to add up the cells that meet certain criteria. That's where the SUMIF function comes in handy, along with the more capable SUMIFS function.


It can sometimes be useful to know the address of a cell in a worksheet, so you can use that address in a formula. In this lesson, we'll look at how to use the ADDRESS function to find out the address of a cell. We'll then use the ADDRESS function in an example to demonstrate how useful it can be.

If you have a column of numbers and you want to calculate a running total of the numbers alongside, you can use the SUM() formula combined with a clever use of absolute and relative references.


The SUMIFS function in Excel allows you to sum the values in a range of cells that meet multiple conditions, or criteria. For example, you might use the SUMIFS function in a sales spreadsheet to to add up the value of sales of a specific product by a given sales person (e.g. the value of all sales of a microwave oven made by John). This lesson explains how to use SUMIFS.