This lesson introduces the LEN() function, which allows you to calculate the number of characters in a cell. This formula is useful on its own, or can be combined with other text functions such as RIGHT(), LEFT(), MID() and FIND().

# 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!

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.

The IF statement is a simple function in Excel that is one of the building blocks you need when you are working with large spreadsheets. You may not know you need it yet, but once you know how to use it, you won't want to live without it.

If you're using Excel to calculate dates, it is useful to know how to add (or subtract) a certain number of working or business days to a date. This lesson introduces the WORKDAY() function and shows you how to use it.

The WORKDAY.INTL() function extends the WORKDAY() function so that you can specify which days are weekend days when adding days to dates. This lesson shows you how to use it.

Excel offers a couple of handy functions that you can use to calculate the smallest and largest values in a range of cells. They are simple functions that go by the names of MIN() and MAX(). This lesson shows you how to use them. It also introduces SMALL() and LARGE(), functions which duplicate what MIN and MAX do, plus more besides.

Excel offers a couple of handy functions that you can use to calculate the smallest and largest values in a range of cells. They are simple functions that go by the names of MIN() and MAX(). This lesson shows you how to use them. It also introduces SMALL() and LARGE(), functions which duplicate what MIN and MAX do, plus more besides.

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.

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.

COUNTBLANK allows you to count the number of empty or blank cells in a range in Excel. This lesson shows you how to use COUNTBLANK, and also shares a couple of things to watch out for when you use COUNTBLANK in an Excel formula.

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