Basic Excel formulas & functions with examples

SUM

The first Excel function you should be familiar with is the one that performs the basic arithmetic operation of addition:

In the syntax of all Excel functions, an argument enclosed in [square brackets] is optional, other arguments are required. Meaning, your Sum formula should include at least 1 number, reference to a cell or a range of cells. For example:

=SUM(B2:B6) - adds up values in cells B2 through B6.

=SUM(B2, B6) - adds up values in cells B2 and B6.

If necessary, you can perform other calculations within a single formula, for example, add up values in cells B2 through B6, and then divide the sum by 5:

=SUM(B2:B6)/5

To sum with conditions, use the SUMIF function: in the 1st argument, you enter the range of cells to be tested against the criteria (A2:A6), in the 2nd argument - the criteria itself (D2), and in the last argument - the cells to sum (B2:B6):

=SUMIF(A2:A6, D2, B2:B6)

In your Excel worksheets, the formulas may look something similar to this:

AVERAGE

The Excel AVERAGE function does exactly what its name suggests, i.e. finds an average, or arithmetic mean, of numbers. Its syntax is similar to SUM's:

Having a closer look at the formula from the previous section (=SUM(B2:B6)/5), what does it actually do? Sums values in cells B2 through B6, and then divides the result by 5. And what do you call adding up a group of numbers and then dividing the sum by the count of those numbers? Yep, an average!

The Excel AVERAGE function performs these calculations behind the scenes. So, instead of dividing sum by count, you can simply put this formula in a cell:

=AVERAGE(B2:B6)

To average cells based on condition, use the following AVERAGEIF formula, where A2:A6 is the criteria range, D3 is he criteria, and B2:B6 are the cells to average:

=AVERAGEIF(A2:A6, D3, B2:B6)

MAX & MIN

The MAX and MIN formulas in Excel get the largest and smallest value in a set of numbers, respectively. For our sample data set, the formulas will be as simple as:

=MAX(B2:B6)

=MIN(B2:B6)

COUNT & COUNTA

If you are curious to know how many cells in a given range contain numeric values (numbers or dates), don't waste your time counting them by hand. The Excel COUNT function will bring you the count in a heartbeat:

While the COUNT function deals only with those cells that contain numbers, the COUNTA function counts all cells that are not blank, whether they contain numbers, dates, times, text, logical values of TRUE and FALSE, errors or empty text strings (""):

For example, to find out how many cells in column B contain numbers, use this formula:

=COUNT(B:B)

To count all non-empty cells in column B, go with this one:

=COUNTA(B:B)

In both formulas, you use the so-called "whole column reference" (B:B) that refers to all the cells within column B.

The following screenshot shows the difference: while COUNT processes only numbers, COUNTA outputs the total number of non-blank cells in column B, including the the text value in the column header.

IF

Judging by the number of IF-related comments on our blog, it's the most popular function in Excel. In simple terms, you use an IF formula to ask Excel to test a certain condition and return one value or perform one calculation if the condition is met, and another value or calculation if the condition is not met:

For example, the following IF statement checks if the order is completed (i.e. there is a value in column C) or not. To test if a cell is not blank, you use the "not equal to" operator ( <>) in combination with an empty string (""). As the result, if cell C2 is not empty, the formula returns "Yes", otherwise "No":

=IF(C2<>"", "Yes", "No")

TRIM

If your obviously correct Excel formulas return just a bunch of errors, one of the first things to check is extra spaces in the referenced cells (You may be surprised to know how many leading, trailing and in-between spaces lurk unnoticed in your sheets just until something goes wrong!).

There are several ways to remove unwanted spaces in Excel, with the TRIM function being the easiest one:

For example, to trim extra spaces in column A, enter the following formula in cell A1, and then copy it down the column:

=TRIM(A1)

It will eliminate all extra spaces in cells but a single space character between words:

LEN

Whenever you want to know the number of characters in a certain cell, LEN is the function to use:

Wish to find out how many characters are in cell A2? Just type the below formula into another cell:

=LEN(A2)

Please keep in mind that the Excel LEN function counts absolutely all characters including spaces:

Want to get the total count of characters in a range or cells or count only specific characters? Please check out the following resources.

AND & OR

These are the two most popular logical functions to check multiple criteria. The difference is how they do this:

• AND returns TRUE if all conditions are met, FALSE otherwise.
• OR returns TRUE if any condition is met, FALSE otherwise.

While rarely used on their own, these functions come in very handy as part of bigger formulas.

For example, to check the test results in columns B and C and return "Pass" if both are greater than 60, "Fail" otherwise, use the following IF formula with an embedded AND statement:

=IF(AND(B2>60, B2>60), "Pass", "Fail")

If it's sufficient to have just one test score greater than 60 (either test 1 or test 2), embed the OR statement:

=IF(OR(B2>60, B2>60), "Pass", "Fail")

CONCATENATE

In case you want to take values from two or more cells and combine them into one cell, use the concatenate operator (&) or the CONCATENATE function:

For example, to combine the values from cells A2 and B2, just enter the following formula in a different cell:

=CONCATENATE(A2, B2)

To separate the combined values with a space, type the space character (" ") in the arguments list:

=CONCATENATE(A2, " ", B2)

TODAY & NOW

To see the current date and time whenever you open your worksheet without having to manually update it on a daily basis, use either:

=TODAY() to insert the today's date in a cell.

=NOW() to insert the current date and time in a cell.

The beauty of these functions is that they don't require any arguments at all, you type the formulas exactly as written above.

Do not enclose numbers in double quotes

Any text included in your Excel formulas should be enclosed in "quotation marks". However, you should never do that to numbers, unless you want Excel to treat them as text values.

For example, to check the value in cell B2 and return 1 for "Passed", 0 otherwise, you put the following formula, say, in C2:

=IF(B2="pass", 1, 0)

Copy the formula down to other cells and you will have a column of 1's and 0's that can be calculated without a hitch.

Now, see what happens if you double quote the numbers:

=IF(B2="pass", "1", "0")

At first sight, the output is normal - the same column of 1's and 0's. Upon a closer look, however, you will notice that the resulting values are left-aligned in cells by default, meaning those are numeric strings, not numbers! If later on someone will try to calculate those 1's and 0's, they might end up pulling their hair out trying to figure out why a 100% correct Sum or Count formula returns nothing but zero.

Don't format numbers in Excel formulas

Please remember this simple rule: numbers supplied to your Excel formulas should be entered without any formatting like decimal separator or dollar sign. In North America and some other countries, comma is the default argument separator, and the dollar sign ($) is used to make absolute cell references. Using those characters in numbers may just drive your Excel crazy :) So, instead of typing $2,000, simply type 2000, and then format the output value to your liking by setting up a custom Excel number format.

Match all opening and closing parentheses

When crating a complex Excel formula with one or more nested functions, you will have to use more than one set of parentheses to define the order of calculations. In such formulas, be sure to pair the parentheses properly so that there is a closing parenthesis for every opening parenthesis. To make the job easier for you, Excel shades parenthesis pairs in different colors when you enter or edit a formula.

Copy the same formula to other cells instead of re-typing it

Once you have typed a formula into a cell, there is no need to re-type it over and over again. Simply copy the formula to adjacent cells by dragging the fill handle (a small square at the lower right-hand corner of the cell). To copy the formula to the whole column, position the mouse pointer to the fill handle and double-click the plus sign.

For the detailed step-by-step instructions, please see How to copy formulas in Excel.

How to delete formula, but keep calculated value

When you remove a formula by pressing the Delete key, a calculated value is also deleted. However, you can delete only the formula and keep the resulting value in the cell. Here's how:

• Select all cells with your formulas.
• Press Ctrl + C to copy the selected cells.
• Right-click the selection, and then click Paste Values > Values to paste the calculated values back to the selected cells. Or, press the Paste Special shortcut: Shift+F10 and then V.

For the detailed steps with screenshots, please see How to replace formulas with their values in Excel.

Make sure Calculation Options are set to Automatic

If all of a sudden your Excel formulas have stopped recalculating automatically, most likely the Calculation Options somehow switched to Manual. To fix this, go to the Formulas tab > Calculation group, click the Calculation Options button, and select Automatic.

If this does not help, check out these troubleshooting steps: Excel formulas not working: fixes & solutions.