About this tool
Three small calculators in one: raise x to the power y, find the nth root of x, and compute the logarithm of x in any base. Each updates live as you type, right in your browser.
Frequently asked questions
Can it take roots of negative numbers?
Only odd integer roots of a negative number have a real value (such as the cube root). Even roots of negatives are reported as having no real root.
What are the rules for the logarithm?
The base must be positive and not equal to 1, and the value must be positive. Other inputs are flagged as outside the domain.