Acronym Finder. Dictionary of Units. Martindale's The Reference Desk. Idioms. Virtual Medical Center. Versaverter. Manufacturer’s Description Do you wake up at night wondering how many square inches there are in a hectare or how many grams are in a slug? Now you can find out. This flexible unit-conversion utility offers a modifiable, Web-updatable knowledge base for unit conversions. Simply select the desired units of measurement from the extensive list provided, or input your own. Glossaries. City_State_ZIP Codes. First Aid. Home.