Well, after numerous requests from our users, I decided to combine the power of Binary numbers calculator with the Conversion of fractional numbers between numeral systems and create a universal calculator which can do simple math (addition, subtraction, division, multiplication, and power) in any numeral system. You can use the "Numeral system base" parameter to setup any base from 2 to 36, like 8 for octal, 16 for hexadecimal, and so on.
It supports fractional numbers as well. Internally it uses the decimal numeral system, and results for fractional numbers may not always be precise. Thus, conversion precision is controlled by the "Precision used for fractional numbers, digits" parameter. More on precision can be found here - Conversion of fractional numbers between numeral systems
Power is used like this number^power (see default values below - 110^10)