Fourth Roots Calculator
Find the principal fourth root of a number, equivalent to taking the square root twice.
What is a Fourth Root?
The fourth root of a number x is a value that, when multiplied by itself four times, equals x. For example, the fourth root of 16 is 2 (since 2 × 2 × 2 × 2 = 16).
Even Roots Constraint
Because multiplying any real number by itself an even number of times always results in a positive number, you cannot take the fourth root of a negative number in the real number system. Doing so yields a complex or imaginary number.
Disclaimer: This calculator is for educational and learning purposes only. While we strive for accuracy, calculations are provided "as-is" without warranty. The accuracy of results depends on the accuracy of input data provided. Always verify important calculations independently. For critical applications or when accuracy is essential, consult with appropriate professionals or use verified reference sources. Educational calculators may contain rounding or approximations.