Nth Root Calculator
Calculate the nth root of any number, including cube roots and higher, free and instant right in your browser.
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How to use this calculator
- Enter the number and the root.
- Press Calculate.
How it works
The nth root is the number that, raised to the power n, gives your input: number^(1/n).
Worked example
cube root of 27. = 3.
Common mistakes
- Confusing the nth root with dividing by n — the 3rd root of 27 is 3, not 9.
- Expecting a real result from an even root of a negative number.
Frequently asked questions
How do I calculate an nth root?
The nth root of x is x^(1/n). The cube root of 64 is 64^(1/3) = 4, since 4 × 4 × 4 = 64.
Can I take the root of a negative number?
Odd roots of negatives are real (the cube root of −8 is −2), but even roots of negatives are not real numbers.
How do I get a cube root?
Enter the number and set the root to 3. Use 4 for a fourth root, 5 for a fifth, and so on.
Related tools
- Square Root Calculator
- Exponent (Power) Calculator
- Cube Root Calculator
- Modulo Calculator
- Prime Number Checker
- Engineering Prefix Calculator
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Cite this tool
Zerdly. (2026). Nth Root Calculator. Retrieved from https://www.zerdly.com/tools/nth-root-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.