Cube Root Calculator
Calculate the cube root of any number, positive or negative.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Enter any number to calculate its cube root.
Your result
3
Cube root
AI explanation
Formula
Cube root = value^(1/3)Worked example
Cube root of 27
| Field | Value |
|---|---|
| Number | 27 |
| Cube root | 3 |
Assumptions
- Unlike square root, cube root is defined for negative numbers too — the cube root of −8 is −2, since (−2) × (−2) × (−2) = −8.
Frequently asked questions
How is a cube root calculated?
The cube root of a number x is the value that, when multiplied by itself three times, equals x — for example, the cube root of 27 is 3 because 3 × 3 × 3 = 27.
Can the cube root of a negative number be calculated?
Yes — unlike square root, cube root (an odd-degree root) of a negative number is a real, negative number. For example, the cube root of −8 is −2.
What about a 4th root or 5th root?
Use the Nth Root Calculator, which supports any root degree you specify.