ffee All tools
EN 中文 FR DE

Root Calculator

Work out the square root, cube root or any nth root of a number, including exact and decimal forms.

Root calculator

Result: —
Degree used: —
Pick a degree above, or type your own in the last box for any nth root.

How to use the Root Calculator

  1. Type the number you want the root of.
  2. Choose a degree such as square root, cube root or 4th root.
  3. Type a custom degree in the last box for any other nth root.

Features

Advertisement

More tools

Quadratic Solver Timestamp Converter Scientific Calculator Expression Evaluator Prime Number Checker Prime Factorization Fibonacci Generator Factorial Calculator Permutations and Combinations Matrix Calculator Determinant Calculator Matrix Inverse Calculator

Frequently Asked Questions

Common questions about the free online root calculator.

Type the number, set the degree to square root and the result appears instantly.
Choose cube root, then enter your number. The cube root of 27 is 3.
Yes. Pick a preset degree or type any whole number from 2 to 99 in the custom box.
No real number multiplied by itself an even number of times gives a negative result.
Yes. The decimal answer is rounded to ten decimal places to keep it readable.
No. Every root is computed locally in your browser, so nothing is sent anywhere.
Yes. The calculator is fully responsive and works on phone, tablet and desktop.
A root undoes a power. The nth root of a number is the value whose nth power is that number.
Yes. It is completely free, unlimited and needs no account or sign-up.

Last updated: October 10, 2026