Square Root Calculator
Free online square root calculator tool.
About Square Root Calculator
The Square Root Calculator is a fast, reliable utility for finding the principal square root of any positive number. A square root of a number 'x' is a value 'y' such that y² = x.
How Square Root Calculator Works
- Step 1: Number: Enter the positive number (radicand) you want to find the root of.
- Step 2: Calculate: The tool uses the built-in math engine to evaluate the exact root.
- Step 3: Result: The principal (positive) square root is displayed.
Frequently Asked Questions
Does a square root have two answers?
Mathematically, yes. Every positive number has a positive and a negative square root (e.g., both 3 and -3 squared equal 9). However, this calculator (and most standard calculators) returns the principal (positive) square root.
Can I find the square root of a negative number?
In the realm of real numbers, no. The square root of a negative number results in an imaginary number (denoted by 'i'). This basic calculator only computes real numbers and will return NaN (Not a Number) for negative inputs.
What is a perfect square?
A perfect square is an integer that is the square of an integer (like 1, 4, 9, 16, 25). Their square roots are always clean whole numbers. Other numbers will result in irrational decimals.