Cube Root Calculator
Cube root of any number.
Enter your values
Enter the number you are working with.
Enter the other root (n) you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Cube root
- 7
- 5th root
- 3.214096
- Square root
- 18.520259
- Cube of the number
- 40353607
- Is it a perfect cube?
- Yes
Quick answer
The cube root of x is the number that, multiplied by itself three times, gives x — and it works for negatives too.
∛x = x^(1/3)
At a glance
| What it does | Cube root of any number. |
|---|---|
| Category | Math |
| Inputs needed | Number, Other root (n) |
| Main output | Cube root |
| Formula | ∛x = x^(1/3) |
| Cost | Free — no sign-up, no download |
How to use the Cube Root Calculator
- 1Enter the number you want the cube root of.
- 2Optionally enter another root index.
- 3Negative numbers work for odd roots.
Inputs explained
- Number
- Enter the number you are working with.
- Other root (n)
- Enter the other root (n) you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Number343
- Other root (n)5
Results
- Cube root7
- 5th root3.214096
- Square root18.520259
- Cube of the number40353607
- Is it a perfect cube?Yes
Frequently asked questions
Can I cube root a negative?
Yes — the cube root of −27 is −3.
What are perfect cubes?
1, 8, 27, 64, 125, 216, 343, 512, 729, 1000.
What do I need to enter into the Cube Root Calculator?
Just 2 values: number, other root (n). Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Cube Root Calculator work out the answer?
The cube root of x is the number that, multiplied by itself three times, gives x — and it works for negatives too. It applies the formula ∛x = x^(1/3) and shows the working so you can check each step by hand.
Is the Cube Root Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.