In the Power tab, enter the base and exponent to instantly see the result of base^exponent. In the Root tab, enter the number and the root degree (n) to calculate the nth root. Since even-degree roots of negative numbers don't exist as real numbers, the tool warns you automatically.
Yes, the tool is completely free and requires no account.
Yes for odd-degree roots (like cube roots), but for even-degree roots (like square roots) the tool warns you since negative numbers have no real root.
Yes, you can calculate with both whole and decimal exponents and root degrees.