base-converter is an extension that allows selections to be converted from one base to another.
Select one more numbers that you'd like to convert (multiple sections can be done by holding the alt key), open the command palette (ctrl+shift+p), and search for "Convert Base" and select an option.
Convert Base Any to Any will prompt you to enter the source base and output base. These can be any two valid base-10 integers separated by any non-digit characters. 10 to 2, 16, 10, 10:64, 2 10, etc. should all work.
The following keybinding is added by default. The other commands can can easily be added, or this can be overwritten, in the user settings.