The radical is nothing but the root symbol we see! If n is any positive number greater then 1 and x is a real number then
$\sqrt[n]{x}$ = $x^{1/n}$
Here n is the index, x is the radicand and symbol $\sqrt{}$ is the radical.
Radical calculator is a online tool to solve any given radical number. You just have to enter the values of radicand and index in the block provided and get the radical number value instantly.

Lets see how to solve the given radical:
Take down the radical number and simplify  it.The radical number will be of form
$\sqrt[n]{x}$
Express the number in the form
$\sqrt[n]{x}$ = $(y^n)^{1/n}$
Cancel out the common terms to get
$\sqrt[n]{x}$ = y.