±Free
Nth root
Compute a real integer-index root, including odd roots of negative numbers.
Enter the radicand and an integer root index. The calculator raises the absolute value to 1/n and restores the sign for negative inputs with an odd index.
How to use
- Enter your text, values, or image.
- Adjust the options and run the tool.
- Copy or download your result.
Worked example
Example input
Radicand: 81 Root index: 4
Example result
3
Limitations and details
The index must be an integer from 1 to 10000; negative radicands with even indices have no supported real result.
Inputs and options
- Radicand
- Number
- Root index
- Number · Minimum: 1 · Maximum: 10000
Frequently asked questions
Is this tool free and private?
Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.