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Root Calculator

Find square roots, cube roots and any nth root of a number.

How it works Report a problem

Root Calculator

Square, cube & nth root with full verification

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About the Root Calculator

Find square roots, cube roots and any nth root of a number.

How to use the Root Calculator

  1. Choose a Root Type: square root, cube root, 4th, 5th, 10th or Custom (n).
  2. Enter the Radicand (x) and, for a custom root, the Degree (n).
  3. Press Calculate.

Formula and method

The nth root of x is the number that, raised to the power n, gives x: ⁿ√x = x^(1/n).

Worked example

√144 = 12, ∛1000 = 10, ⁴√256 = 4 and √2 ≈ 1.41421 (irrational).

Tips

  • Even roots of negative numbers are not real numbers.
  • Perfect squares and cubes give whole-number roots.

Frequently asked questions

What is a radicand?
The number under the root sign.