Fourth Root Calculator

Find the fourth root of a number.

Fourth root 3

Formula: ⁴√x = x^(1/4)

Step-by-step with your numbers:

1. Values used:

2. Number = 81

4. Fourth root = 3

Did we solve your problem today?

The fourth root of x is the number that, raised to the fourth power, gives x.

The math behind it

⁴√x = x^(1/4), which is also the square root of the square root of x.

⁴√81 = 3, because 3⁴ = 81.

Why no real fourth root of a negative?

An even root of a negative number is not real.