Square Root Calculator

The square root of a number is the value that, multiplied by itself, gives that number. The square root of 144 is 12, and the square root of 2 is approximately 1.414 — an irrational number that never ends.

Square roots appear constantly in geometry (the diagonal of a square, the Pythagorean theorem), statistics (standard deviation) and physics. This calculator handles any non-negative number and returns the result rounded to a practical precision. For powers and exponents, see the power calculator.