ConvertX a (User Friendly Win32) utility program converting various types of measurement units supports (in 3 basic categories) up to 1864 constants and conversions. Each category of units containing lots of unit types in them.

1. 
   International Constants
   
   Categories: 21
   Constants: 300
2. 
   Units and Conversions
   
   Categories: 46
   Units/Conversions: 1459
3. 
   Extras (Clothing)
   
   Categories: 13
   Conversions: 105

ConvertX is the Shareware version. The full version can be purchased by clicking on the "CLICK HERE TO ORDER" button below for around 18.00USD.