SensibleUnits Converts Measurements to Real-World Objects  Web
site SensibleUnits converts virtually any unit of measure to
real-world objects to help you get a better understanding of the
practical size of something. We've shown you before that you can
use Google to calculate most conversions, but what Google
doesn't provide you are real-world applications for what a unit
of measure means in a physical space. SensibleUnits can tell
you, for example, how many CDs you'll need to burn 16GBs, how
many grains of sand are in 30 cubic millimeters, or how many
sheets of paper would make up 30 square feet. The site also does
straight unit-to-unit conversion if you're looking for lightning
fast conversions from one unit of measure into a multitude of
others. UPDATE: Our apologies for the déjà vu.