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
You can GET Base Converter HERE from the iPhone App Store
(link will launch iTunes)