Root Calculator
Calculate any root of a number — square root, cube root, or any higher-degree root.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Enter a value and a root degree to calculate that root.
Your result
3
Result
AI explanation
Formula
Result = value^(1 ÷ n)Worked example
Cube root of 27
| Field | Value |
|---|---|
| Value | 27 |
| Root degree | 3 |
| Result | 3 |
Assumptions
- An even-degree root (square root, 4th root, etc.) of a negative number is not a real number and shows an error.
- An odd-degree root of a negative number returns a negative real result (e.g. cube root of -8 is -2).
Frequently asked questions
What is this different from the Nth Root Calculator?
Nothing — they use the same formula. This page is offered under the general "root calculator" search term.
Is there a dedicated calculator for square or cube roots?
Yes — see the Square Root Calculator or Cube Root Calculator for those specific, single-purpose versions.
Why can't I take an even root of a negative number?
An even power of any real number (positive or negative) is always non-negative, so no real number squared (or raised to any even power) can equal a negative number.