Square Root Calculator
Calculate the square root of a positive number instantly, with the square and perfect-square check shown for reference.
Enter a Number
Square Root Result
√ Number
12
Square Root
12.000000
Square
144
Perfect Square?
Yes
Nearest Whole Root
12
What is a square root?
The square root of a number is a value that, when multiplied by itself, produces the original number.
√N × √N = N
For example, the square root of 144 is 12 because 12 × 12 = 144.
Note: This calculator accepts zero and positive numbers. A real square root is not defined for negative numbers.