Cube Root Calculator
Calculate cube root instantly in your browser.
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What this tool does
Calculate cube root instantly in your browser. Cube roots are defined for every real number, including negatives.
How to use the Cube Root Calculator
- Enter or select number.
- Read the calculated result; change any measurement to compare alternatives.
Formula
∛x is the number whose cube is x; unlike square roots, cube roots of negative numbers are real (∛−8 = −2).
- x
- Number
Cube roots are defined for every real number, including negatives.
Worked example
For cube root calculator, the following measurements illustrate the exact method: Number: 27.
Inputs
- Number27
Result
- Cube root3
- Is it a perfect cube?Yes
- Cube of the root27
Results explained
- Cube root
- Cube root from the formula above. Cube roots are defined for every real number, including negatives.
- Is it a perfect cube?
- Is it a perfect cube? from the formula above. Cube roots are defined for every real number, including negatives.
- Cube of the root
- Cube of the root from the formula above. Cube roots are defined for every real number, including negatives.
Frequently asked questions
∛x is the number whose cube is x; unlike square roots, cube roots of negative numbers are real (∛−8 = −2).
Cube roots are defined for every real number, including negatives.
Where mathematically meaningful, yes. Fields specify permitted ranges and undefined operations display an error.
Exact integer calculations use safe integers; decimal calculations use browser floating point, so small rounding differences can occur.
All values remain in your browser and are never uploaded.