Square Root Calculator
Find the square root, cube root, nth root and square of any number.
About the Square Root Calculator
The AlarmDaddy Square Root Calculator finds the square root of any non-negative number, tells you whether it is a perfect square, and also gives the cube root, the square (n²) and an nth root of your choosing. It is a quick companion for geometry, algebra and everyday estimates.
Enter a number and, optionally, a root degree. The calculator shows the principal square root, flags perfect squares like 144 = 12², and computes higher roots so you can, for example, find the 4th root of a number in the same place.
How to use this calculator
- 1Enter a non-negative number.
- 2Optionally set the root degree (2 for square root, 3 for cube root, etc.).
- 3Read the square root, cube root, nth root and square.
The formula
A root is a fractional power: the square root is the ½ power, the cube root the ⅓ power, and the nth root the 1/n power. A number is a perfect square when its square root is a whole number.