Square Root Calculator
Find the square root of any number instantly — √x with a step-by-step check. — free, fast and private.
Your square root will appear here.
Example: √144 = 12, because 12 × 12 = 144. √2 ≈ 1.4142.
How to use Square Root Calculator
- Enter any positive number.
- Click Calculate Square Root.
- See the square root and a check by squaring the answer.
- Try perfect squares like 144 or decimals like 2.
Note: this tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
What is a square root?
The square root of x is the number that, multiplied by itself, gives x. For example, √144 = 12 because 12 × 12 = 144.
Can I find the square root of a negative number?
Not with real numbers — no real number squared gives a negative result. Negative inputs need complex numbers, which this tool does not cover.
What is the square root of 2?
About 1.41421356. It is irrational, so the decimal goes on forever without repeating.
Is my data uploaded anywhere?
No. All calculations run in your browser and your numbers are never sent to a server.