Root Calculator
Calculate square roots, cube roots, and any nth root with high precision. Handles perfect squares and irrational results — shows the decimal approximation and the radical form.
3√64
4
How to use the root calculator
Enter the radicand (the number under the root) and the root degree. Square root is degree 2, cube root is 3, and so on.
Formula & explanation
ⁿ√x = x^(1/n). For negative radicands with odd n, the real root is −|x|^(1/n).
Examples
²√64 = 8. ³√64 = 4. ⁴√16 = 2. ³√−27 = −3.
Frequently asked questions
- Why does even root of negative show error?
- It's complex — there's no real number whose even power is negative.
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