Radical Calculator
Use our radical calculator to evaluate radical expressions quickly. Enter a number and a radical degree to compute the nth root. Includes how to calculate radical expressions, what a radical calculator is, and a simple radical calculator step by step explanation.
What is a Radical Calculator?
A radical is an expression that uses a root symbol (like √ or ∛). The most common radical is the square root √x, but you can also take cube roots, fourth roots, and so on.
A radical calculator evaluates these expressions for you. If you’re asking what is a radical calculator, it’s simply a tool that calculates roots (nth roots) and helps you work with radical expressions without doing the math by hand.
This radical function calculator supports a general nth root: the n-th root of a number a.
Radical Formula
A radical (nth root) can be written using a root symbol or using exponent form.
This is the core radical formula used by a radical formula calculator.
Raising the nth root to the power n returns the original number.
Because 2^4 = 16.
Rewrite the radical as an exponent, then compute the power 1/n.
How to Use the Radical Calculator
- 1
Enter the number a (the radicand).
- 2
Enter the radical degree n (2 for square root, 3 for cube root, etc.).
- 3
The calculator computes the radical value: ⁿ√a = a^(1/n).
- 4
If you want a radical calculator step by step method, rewrite the radical as an exponent (1/n) and evaluate.
Frequently Asked Questions
Most radicals are roots. Use ⁿ√a = a^(1/n). For square roots, n=2; for cube roots, n=3; and so on.
A radical calculator evaluates roots (like √a or ⁿ√a) and simplifies or computes radical expressions.
It computes the nth root of a number: ⁿ√a.
ⁿ√a = a^(1/n).
For odd degrees (like cube root), yes: ∛(-8) = -2. For even degrees (like square root), negative inputs are not real numbers (they are complex).
Many radicals are irrational (like √2), so calculators show a decimal approximation.
The page includes the formula and how-to steps; the computed result is the evaluated nth root.