Cryptarithm Helper

Enter the base, an optional alphabetic key, and one or two numbers either in the given base, in base 10, or, if key entered, as key letters. Click a button.

Base is:             Key is: Key order: (0-base) (0-1) (base-0) (1-0)

Number in given base is:             Number in base 10 is:             Number's Key letters:
Second number in given base (for sum, product, etc):         Second Number in base 10 is:       Second Number's Key letters: