the author of this app says:
Are you wondering how many acres your 150x200 lot contains? Or perhaps how many teaspoons there are in a tablespoon?
This conversion tool will convert more than 850 different units in 75 different categories. If you have a measurement for anything, UnitIQ will convert it for you.
Have you read Jules Verne's "69,046.638 Miles (20,000 Leagues) Under the Sea"?