It asks for the number that, when raised to the power of 3, equals 8.
What is the Cube Root of 8?
The cube root of 8 is 2. Calculate another value or review the exact form, nearby perfect powers, and verification.
Answer
Cube Root∛8 = 2
ExactPerfect cubeRational
Exact form2
Perfect cubeYes
Number typeRational
Verification23 ≈ 8
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How the answer is calculated
We solve x3 = 8. The resulting value is x = 2.
Verification: 23 ≈ 8.
Nearest Perfect cubes
| Position | Base | Value |
|---|---|---|
| Lower or equal | 2 | 8 |
| Upper or equal | 2 | 8 |
Number properties
Is 8 a perfect cube?
Yes. Its cube root is the whole number 2.
Is the cube root rational or irrational?
2 is rational because it is a whole number.
Visual guide
Cube Root function graph
See how the result changes as the input moves across positive and negative values. Square roots are shown for non-negative inputs; cube roots continue through negative inputs.
Common questions
Frequently asked questions
The answer is exact because this input is a perfect cube.
Yes. Enter any supported number in the calculator above and select Calculate.