Square Root Calculator
Formula
√n = n^(1/2)
The square root of a number is a value that, when multiplied by itself, gives the original number. For example, √144 = 12 because 12 × 12 = 144.
Frequently Asked Questions
What is a perfect square?
A perfect square is a number whose square root is a whole number. Examples: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144.
Can you take the square root of a negative number?
Not in the real number system. The square root of a negative number involves imaginary numbers (e.g., √-1 = i). This calculator works with non-negative numbers only.
What is the square root of 2?
√2 ≈ 1.414214. It's an irrational number, meaning it has infinite non-repeating decimal places.