Square Root Calculator
Calculate the square root of any positive number instantly.
What Is a Square Root?
A square root is a number that, when multiplied by itself, produces the original number.
This means that:
For example, the square root of 144 is 12 because:
Square Root Examples
- √4 = 2
- √9 = 3
- √16 = 4
- √25 = 5
- √100 = 10
- √144 = 12
- √225 = 15
Square Roots of Non-Perfect Squares
Not every number has a whole-number square root. For example, √10 is approximately 3.16227766.
Square Root of Zero
The square root of zero is zero.
How to Use the Square Root Calculator
- Enter a positive number in the input box.
- Click the Calculate button.
- The square root will be displayed instantly.
- Use the Reset button to perform another calculation.
You can enter whole numbers as well as decimal numbers.
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Frequently Asked Questions
What is the square root of a number?
The square root is a value that produces the original number when multiplied by itself.
What is the square root of 144?
The square root of 144 is 12 because 12 × 12 = 144.
Can this calculator calculate decimal square roots?
Yes. You can enter decimal numbers and the calculator will provide an accurate square root.
Can I calculate the square root of a negative number?
A negative number does not have a real square root. Therefore, this calculator accepts zero and positive numbers only.
What is the square root of 0?
The square root of 0 is 0.