UnitConversion.org is quite the resource to easily convert between different units of measurement. It has over 2100 units in 78 categories, which range from those that are common, such as, length, weight, volume, currency, velocity, and pressure, to more specialized categories like magnetic flux density, electrostatic capacitance, and surface tension.
posted by netbros on Jun 11, 2009 - 27 comments

123 mm = 12 stacked CD cases. 6 miles = 30 Eiffel Towers. 5 acres = 11 ice hockey rinks. Sensibleunits.com converts any length, area or mass into real objects.
posted by gottabefunky on Jun 5, 2008 - 34 comments

You convert it.
posted by goodnewsfortheinsane on Sep 19, 2007 - 25 comments

Convert your pictures to HTML. So cool I nearly wet myself.
Seriously.
posted by TiggleTaggleTiger on Jan 23, 2002 - 26 comments