Enter details and click calculate to view the results instantly.
Calculation Examples
Scenario Inputs
Output Result
number : 144
Square Root: 12
About Square Root Calculator
Square Root Solver. Find the square root of any positive real number. Starlightopia provides this tool completely free and online, optimized for instant, accurate computations.
How It's Calculated
Can you calculate the square root of a negative number?
Within real numbers, you cannot take the square root of a negative number; doing so requires imaginary numbers (i).
Technical Specifications
CategoryMath
Target ValueSquare Root
Inputs Required (1)
Number (number)
Frequently Asked Questions
What is a perfect square?
A perfect square is an integer that can be written as the product of two identical integers, such as 9 (3 x 3) or 16 (4 x 4).
Can you calculate the square root of a negative number?
Within real numbers, you cannot take the square root of a negative number; doing so requires imaginary numbers (i).
What is the principal square root?
The principal square root is the non-negative square root of a positive real number.
How can I estimate square roots without a calculator?
You can estimate by finding the two closest perfect squares and interpolating between their roots.
Is the square root of 2 a rational number?
No, the square root of 2 is an irrational number with an infinite, non-repeating decimal expansion (~ 1.4142).