Base Converter is an iPhone Application which converts between several types of numbering systems: Decimal, Hex, Octal, Binary, BCD, ASCII, Unicode, and UTF8.  

For quick reference, there is an ASCII table, and (new in v1.3) also a Unicode table available with the click of a single button.

How Base Converter works: Simply type a value into any one of the inputs, and it is immediately converted into the each of the other types. 

Each input is filtered to the available digits:

  Decimal: 0-9
  Hex: 0-9,A-F
  Octal: 0-7
  Binary: 0-1
  BCD: 0-9   ASCII: ASCII, Unicode, and UTF8 Characters

Detailed Help and Instructions