# Functions

Discover how functions in Excel help you save time. If you are new to functions in Excel, we recommend you to read our introduction to Formulas and Functions first.

Count and Sum: The most used functions in Excel are the functions that count and sum. You can count and sum based on one criteria or multiple criteria.

2 Logical: Learn how to use Excel's logical functions, such as IF, AND, OR and NOT.

3 Cell References: Cell references in Excel are very important. Understand the difference between relative, absolute and mixed reference, and you are on your way to success.

4 Date & Time: To enter a date, use the "/" or "-" characters. To enter a time, use the ":" (colon).

5 Text: Excel has many functions to offer when it comes to manipulating text strings.

6 Lookup & Reference: Learn all about Excel's lookup & reference functions, such as VLOOKUP, HLOOKUP, MATCH, INDEX and CHOOSE.

7 Financial: This chapter illustrates Excel's most popular financial functions.

8 Statistical: An overview of some very useful statistical functions in Excel.

9 Round: This chapter illustrates three functions to round numbers in Excel. ROUND, ROUNDUP and ROUNDDOWN.

10 Formula Errors: This chapter teaches you how to deal with some common formula errors.

11 Array Formulas: This chapter helps you understand array formulas in Excel. Single cell array formulas perform multiple calculations in one cell.

## Functions+

Start learning today and become an Excel pro! You can find related examples and functions on the right side of each chapterat the bottom of each chapter. Below you can find an overview.

10 Formula Errors: IfError | IsError | Aggregate | Circular Reference | Formula Auditing | Floating Point Errors | IFNA

## What's Popular?

Explore the 40 most popular pages in this section. Below you can find a description of each page. Happy learning!

1 Vlookup: The VLOOKUP function is one of the most popular functions in Excel. This page contains many easy to follow VLOOKUP examples.

2 Percent Change: The percent change formula is used very often in Excel. For example, to calculate the Monthly Change and Total Change.

3 Loan Amortization Schedule: This example teaches you how to create a loan amortization schedule in Excel.

4 Random Numbers: Excel has two very useful functions when it comes to generating random numbers. RAND and RANDBETWEEN.

5 If: The IF function is one of the most used functions in Excel. This page contains many easy to follow IF examples.

6 Standard Deviation: This page explains how to calculate the standard deviation based on the entire population using the STDEV.P function in Excel and how to estimate the standard deviation based on a sample using the STDEV.S function in Excel.

7 Count Unique Values: This example shows you how to create an array formula that counts unique values.

8 Countif: The powerful COUNTIF function in Excel counts cells based on one criteria. This page contains many easy to follow COUNTIF examples.

9 Offset: The OFFSET function in Excel returns a cell or range of cells that is a specified number of rows and columns from a cell or range of cells.

10 Compare Two Columns: To compare two columns, use IF, ISERROR and MATCH in Excel. You can display the duplicates or the unique values.

11 Compound Interest: What's compound interest and what's the formula for compound interest in Excel? This example gives you the answers to these questions.

12 Sumif: The powerful SUMIF function in Excel sums cells based on one criteria. This page contains many easy to follow SUMIF examples.

13 Concatenate: Use CONCATENATE, CONCAT, TEXTJOIN or the & operator in Excel to concatenate (join) two or more text strings.

14 Weighted Average: To calculate a weighted average in Excel, simply use SUMPRODUCT and SUM.

15 Index and Match: Use INDEX and MATCH in Excel and impress your boss. Instead of using VLOOKUP, use INDEX and MATCH. To perform advanced lookups, you'll need INDEX and MATCH.

16 Sumproduct: To calculate the sum of the products of corresponding numbers in one or more ranges, use Excel's powerful SUMPRODUCT function.

17 Contains Specific Text: To check if a cell contains specific text, use ISNUMBER and SEARCH in Excel. There's no CONTAINS function in Excel.

18 Pmt: The PMT function in Excel calculates the payment for a loan based on constant payments and a constant interest rate. This page contains many easy to follow PMT examples.

19 Calculate Age: To calculate the age of a person in Excel, use DATEDIF and TODAY. The DATEDIF function has three arguments.

20 Indirect: Use the INDIRECT function in Excel to convert a text string into a valid reference. You can use the & operator to create text strings.

21 CAGR: There's no CAGR function in Excel. However, simply use the RRI function in Excel to calculate the compound annual growth rate (CAGR) of an investment over a period of years.

22 If Cell is Blank: Use the IF function and an empty string in Excel to check if a cell is blank. Use IF and ISBLANK to produce the exact same result.

23 Average: The AVERAGE function in Excel calculates the average (arithmetic mean) of a group of numbers.

24 Substring: There's no SUBSTRING function in Excel. Use MID, LEFT, RIGHT, FIND, LEN, SUBSTITUTE, REPT, TRIM and MAX in Excel to extract substrings.

25 Sum: Use the SUM function in Excel to sum a range of cells, an entire column or non-contiguous cells.

26 Remove Spaces: The TRIM function in Excel removes leading spaces, extra spaces and trailing spaces. Use the SUBSTITUTE function to remove all spaces or non-breaking spaces.

27 Comparison Operators: Use comparison operators in Excel to check if two values are equal to each other, if one value is greater than another value, etc.

28 NPV: The correct NPV formula in Excel uses the NPV function to calculate the present value of a series of future cash flows and subtracts the initial investment.

29 AverageIf: The AVERAGEIF function in Excel calculates the average of cells that meet one criteria. AVERAGEIFS calculates the average of cells that meet multiple criteria.

30 Xlookup: If you have Excel 365 or Excel 2021, use XLOOKUP instead of VLOOKUP. The XLOOKUP function is easier to use and has some additional advantages.

31 Hyperlinks: Use the 'Insert Hyperlink' dialog box in Excel to create a hyperlink to an existing file, a web page or a place in this document. You can also use the HYPERLINK function.

32 Forecast: The FORECAST.LINEAR function in Excel predicts a future value along a linear trend. The FORECAST.ETS function in Excel predicts a future value using Exponential Triple Smoothing, which takes into account seasonality.

33 Add or Subtract Time: Use the TIME function in Excel to add or subtract hours, minutes and seconds. To add up times in Excel, simply use the SUM function.

34 Copy a Formula: Simply use CTRL + c and CTRL + v to copy and paste a formula in Excel. Use the fill handle in Excel to quickly copy a formula to other cells.

35 Time Difference: Calculating the difference between two times in Excel can be tricky. Times are handled internally as numbers between 0 and 1.

36 IRR: Use the IRR function in Excel to calculate a project's internal rate of return. The internal rate of return is the discount rate that makes the net present value equal to zero.

37 Not Equal To: In Excel, <> means not equal to. The <> operator in Excel checks if two values are not equal to each other. Let's take a look at a few examples.

38 Today's date: To enter today's date in Excel, use the TODAY function. To enter the current date and time, use the NOW function.

39 Absolute Reference: An absolute reference in Excel refers to a fixed location on a worksheet. When you copy a formula, an absolute reference never changes.

40 Running Total: This page teaches you how to create a running total (cumulative sum) in Excel. A running total changes each time new data is added to a list.

Check out all 300 examples.