http://download.sysinternals.com/files/Hex2Dec.zip
Introduction
Tired of running Calc everytime you want to convert a hexadecimal number to decimal Now you can convert hex to decimal and vice versa with this simple command-line utility.
Usage: hex2dec [hex|decimal]
Include x or 0x as the prefix of the number to specify a hexadecimal value.
e.g. To translate 1233 decimal to hexadecimal: hex2dec 1233
e.g. To translate 0x1233 decimal to hexadecimal: hex2dec 0x1233
