Square Root on Windows Calculator
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Reviewed by Calculator Editorial Team
The Windows Calculator app includes a square root function that allows you to find the square root of any positive number. This guide explains how to use this feature, provides the mathematical formula, and includes examples to help you understand how square roots work.
How to Use the Windows Calculator for Square Roots
Calculating square roots on Windows is straightforward. Here's how to do it:
- Open the Calculator app from the Start menu or by searching for "Calculator" in the Windows search bar.
- Switch to the "Scientific" view by clicking the "Scientific" button at the top of the calculator.
- Enter the number you want to find the square root of.
- Click the "√" (square root) button.
- The calculator will display the square root of the number you entered.
Note: The Windows Calculator only calculates square roots of positive numbers. If you enter a negative number, the calculator will display an error message.
Square Root Formula
The square root of a number x is a value that, when multiplied by itself, gives you x. Mathematically, this is represented as:
√x = y, where y × y = x
For example, the square root of 16 is 4 because 4 × 4 = 16.
Examples of Square Root Calculations
Here are a few examples of square root calculations using the Windows Calculator:
| Number | Square Root |
|---|---|
| 25 | 5 |
| 36 | 6 |
| 49 | 7 |
| 64 | 8 |
| 81 | 9 |
These examples show how the square root function works in practice. You can use the Windows Calculator to find the square roots of any positive numbers you need.
Frequently Asked Questions
What is the square root of a negative number?
The square root of a negative number is not a real number. In mathematics, the square root of a negative number is represented using the imaginary unit "i", where i = √(-1). For example, √(-4) = 2i.
Can I use the Windows Calculator to find the square root of a decimal number?
Yes, the Windows Calculator can find the square root of any positive decimal number. Simply enter the decimal number and click the "√" button to get the result.
What happens if I try to find the square root of zero?
The square root of zero is zero. This is because 0 × 0 = 0. The Windows Calculator will display 0 as the result when you enter 0 and click the "√" button.