Frequently asked questions
Why can't I take the square root of a negative number?
Even-degree roots (square root, 4th root, etc.) of negative numbers do not exist in the real number system. Odd-degree roots, like cube roots, work fine with negatives (for example, the cube root of -8 is -2).
Can I enter a decimal or negative value for the root degree (n)?
This calculator is designed for whole-number degrees such as 2, 3, or 4. Fractional degrees can be understood conceptually through the exponent form x^(1/n), but for input it is best to use whole numbers.
How precise are the results?
The calculator uses floating-point arithmetic accurate to many decimal places, which is more than enough precision for everyday, academic, and most engineering purposes.
Is the nth root of 1 always 1?
Yes, since 1 multiplied by itself any number of times is still 1, every nth root of 1 equals 1. Similarly, the nth root of 0 is always 0.
Does the calculator work accurately for high degrees, like a 10th root?
Yes. As the degree increases, the result tends to move closer to 1, and the calculator handles any positive integer degree with accurate results.