IS Converter is a very simple, totally free program that doesn`t even need installing. It is a very complete utility that lets you convert among more than 300 units of measurement to the international system.
IS Converter is divided into 16 categories according to the type of measurement you want to convert. Some of those categories are: area, temperature, time, speed, volume, mass, power, force, length, pressure, etc.
Also, IS Converter has a practical internal searcher to more easily locate the measurement to convert.