Square Root Calculate in Excel
'/%3E%3Ccircle cx='48' cy='39' r='19' fill='%23f2c9a5'/%3E%3Cpath d='M27 35c3-16 39-17 42 2-8-8-27-9-42-2z' fill='%23374151'/%3E%3Cpath d='M21 86c5-24 49-28 56 0z' fill='%232563eb'/%3E%3Ccircle cx='41' cy='41' r='2' fill='%23111827'/%3E%3Ccircle cx='55' cy='41' r='2' fill='%23111827'/%3E%3Cpath d='M42 52c4 3 9 3 13 0' stroke='%2392400e' stroke-width='3' fill='none' stroke-linecap='round'/%3E%3C/svg%3E)
Reviewed by Calculator Editorial Team
Calculating square roots in Excel is essential for mathematical operations, data analysis, and financial modeling. This guide explains how to use Excel's built-in functions to compute square roots accurately, with practical examples and a built-in calculator.
How to Calculate Square Root in Excel
Excel provides several methods to calculate square roots, each with different precision and application scenarios. The most common approach uses the SQRT function, which returns the positive square root of a number.
- Open your Excel spreadsheet and select the cell where you want the result to appear.
- Type the formula
=SQRT(number), replacing "number" with the cell reference or value you want to calculate. - Press Enter to display the result.
Note
The SQRT function returns the positive square root. If you need the negative square root, you can multiply the result by -1.
Excel Formula for Square Root
The basic syntax for calculating square roots in Excel is:
Formula
=SQRT(number)
Where "number" is the value or cell reference for which you want to calculate the square root.
For more precise calculations, especially with very large or very small numbers, you can use the POWER function:
Alternative Formula
=number^(1/2)
This method uses exponentiation to achieve the same result as the SQRT function.
Worked Examples
Let's look at some practical examples of calculating square roots in Excel.
Example 1: Basic Square Root Calculation
Suppose you want to calculate the square root of 25. In cell A1, enter the value 25. In cell B1, enter the formula =SQRT(A1). The result will be 5.
| Cell | Value | Result |
|---|---|---|
| A1 | 25 | |
| B1 | =SQRT(A1) | 5 |
Example 2: Using Cell References
If you have a range of numbers in column A, you can calculate their square roots in column B using the formula =SQRT(A2) and dragging the fill handle down.
| Cell | Value | Result |
|---|---|---|
| A2 | 16 | |
| B2 | =SQRT(A2) | 4 |
| A3 | 36 | |
| B3 | =SQRT(A3) | 6 |
Frequently Asked Questions
What happens if I enter a negative number in the SQRT function?
Excel will display a #NUM! error because the square root of a negative number is not a real number. To handle negative numbers, you can use the ABS function to get the absolute value first: =SQRT(ABS(number)).
Can I calculate the square root of a complex number in Excel?
No, Excel's SQRT function only works with real numbers. For complex numbers, you would need to use a more advanced tool or programming language.
Is there a difference between SQRT and POWER functions for square roots?
No, both methods produce the same result. The SQRT function is specifically designed for square roots, while POWER with exponent 0.5 is a general-purpose exponentiation function.