Cube Root Calculator
Find the cube root of any number instantly — ∛x, including negative numbers. — free, fast and private.
Your cube root will appear here.
Example: ∛27 = 3, because 3 × 3 × 3 = 27. ∛(−8) = −2.
How to use Cube Root Calculator
- Enter any number, positive or negative.
- Click Calculate Cube Root.
- See the cube root and a check by cubing the answer.
- Try perfect cubes like 27, 64 or 125.
Note: this tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
What is a cube root?
The cube root of x is the number that, multiplied by itself three times, gives x. For example, ∛27 = 3 because 3 × 3 × 3 = 27.
Can I find the cube root of a negative number?
Yes. Unlike square roots, cube roots of negative numbers are real: ∛(−8) = −2 because (−2)³ = −8.
What is the cube root of 2?
About 1.259921. Like √2, it is irrational and its decimal never ends or repeats.
Is my data uploaded anywhere?
No. All calculations run in your browser and your numbers are never sent to a server.