STEP BY STEP
How to use the Root Calculator
- Enter the radicand.
- Enter the root index.
- Calculate the real root.
- Check the validation note for negative values.
Math & Number Systems
Root Calculator
Calculate square roots, cube roots, or any real nth root.
GlobalExact or deterministic
=Your result will appear here
Enter values and select Calculate.
APPLICABILITY
Where this result fits
- Region
- Global
- Result type
- Exact or deterministic
- Standards basis
- NIST Digital Library of Mathematical Functions
- Edition / version
- Named mathematical reference; publisher page reviewed July 25, 2026
Important: Use the displayed precision and the stated domain limits for your purpose. Methodology
ACCURACY & LIMITS
What to know before using the result
- Negative values have real roots only for odd integer indices.
- The root index cannot be zero.
HELP
Frequently asked questions
How accurate is the Root Calculator?
The calculator uses the formula shown on this page and keeps full numeric precision internally before formatting the result. Negative values have real roots only for odd integer indices.
Does the Root Calculator upload my input?
No. The calculation or processing runs locally in your browser. UtiliNest does not receive or store the values you enter.
Can I use the Root Calculator on a phone?
Yes. The inputs, result controls, and explanatory content are designed for current mobile and desktop browsers.
Where does the Root Calculator apply?
Applicability: Global. Result classification: Exact or deterministic. Use the displayed precision and the stated domain limits for your purpose.
SOURCES
Definitions and references
Reviewed against the references below on July 25, 2026. Links open the source publisher's website. Read the source policy