ConvertAll Portable 0.5.2 is a unit and measurement converter that easily converts between metric and imperial and over 400 units. It's packaged in PortableApps.com Format so it can easily integrate with the PortableApps.com Suite. It supports upgrades by installing right over an existing copy, preserving all settings. And it's open source and completely free.

ConvertAll Features
* The base units for conversion may be either typed (with auto-completion) or selected from a list.
* Units may be selected using either an abbreviation or a full name.
* Units may be combined with the "*" and "/" operators.
* Units may be raised to powers with the "^" operator.
* Units in the denominator may be grouped with parenthesis.
* Units with non-linear scales, such as temperature, can also be converted.
* A unit list may be filtered and searched
* Recently used unit combinations may be picked from a menu.
* Numbers may be entered on either the "From" or the "To" units side, for conversions in both directions.
* Basic mathematical expressions may be entered in place of numbers.
* Options control the formatting of numerical results.
* The unit data includes over 500 units.
* The format of the unit data file makes it easy to add additional units.
* Command line options are available to do conversions without the GUI.

November 2, 2011 - Release 0.5.2
- Updates:
* Added the microliter volume unit.
* Added the galileo acceleration unit.
* Added the stremma land area unit.
- Bug Fixes:
* Changed the method of identifying a "unitless" portion of a unit to avoid falsely reporting incompatibility between some units when using language translations.