**Excel Square Root Function** **(Table of Contents)**

- Square Root in Excel
- Where is Square Root function found in Excel?
- How to Use the Square Root Function in Excel?

## Square Root in Excel

When a given number multiplied by itself, it provides a number as a result. This resultant number is called the square root of a given number.

Excel provides an in-built function for calculating the square root of a number. This function falls under Math & Trigonometry functions category.

### Definition

It is a built-in function and it can be used as a Worksheet function in Excel. It can be used as part of a formula in a cell of a worksheet.

Below is the Square Root Formula:

The Square Root formula has one argument:

**Number:**It is the number for which you want to calculate the square root. This number should be a positive number.

**Where is Square Root function found in Excel?**

As we discussed in the above section, this function falls under the Math & Trig functions category, thus for this function follow the below steps:

- Click on
**Formulas**tab. - Click on
**Math & Trig**option under Function Library section. Refer below screenshot.

- It will open a drop-down list of functions and we have to select the
**SQRT**Function as shown in below screenshot.

- After clicking on this, it will open a
**Function Arguments**dialog box as shown in below screenshot.

- Enter the value for which you want to calculate the square root under
**Number**field.

**How to Use the Square Root Function in Excel?**

It is very simple and easy to use. Let’s understand the working of Square Root function by some Square Root Formula example.

### Example #1

We have given the below list of numbers.

Now apply the formula for the above-given number as below:

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The Result will be as below:

Drag this formula for the rest values and the result is shown below:

### Example #2

The supplied number in the function should be positive. If the given number is negative, the SQRT function returns an error **#NUM!** value.

Still, if you want to calculate the square root of a negative number, then first you need to convert that given number to a positive value, then you can apply the formula.

Suppose the below-given list of numbers:

We will first use the ABS function which returns the absolute number of a number and converts the negative number to a positive value. The ABS function ignores the sign of the given number.

Now apply the function as below:

The Result will be as below:

Drag & drop this function for the rest values and the result is shown below:

### Example #3

If we apply the SQRT function to a negative number, it shows an error value.

Suppose we have to calculate the square root of number -100.

We will apply the function here as follows:

The result is shown below:

**Things to Remember Here**

**#NUM!**– This error occurs when the supplied argument of the SQRT function is a negative value.- The SQRT function can be used with multiple functions like ABS, ROUND, etc. depends on the result you want.
- There is no way to square a number and the result is of a negative number, hence the square root of a negative number doesn’t exist.

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