Unit Converter EX is a simple and free utility that helps you make easy metric conversion between various units and measurements, including weight, length, volume, area and more. To do your conversion, simply select the type of the units in the selection box and chose units that you would like to do conversion between. Then, if you enter a numerical value in one of the text fields, you get the converted value in the other field. It rounds results to the desired number of significant digits selected by you.