UUC (Universal Unit Convertor) for Windows

Universal Unit Convertor 1.0 is the absolute conversion tool between all human systems of measurement. The program allows conversion between: SI (International System of Units) / Metric System, British / Imperial System, U.S. Customary System, Natural Units System, and Non-Standard Units Systems. You will be able to convert all basic/base/fundamental units such as those of length, mass, time, electrical current, temperature, matter, and luminosity between the same system and other systems.

Also you will be able to convert values of derived units such as: area, volume, speed/velocity, acceleration, etc. and derived units with specific names (standard and non-standard) such as: frequency, force, energy, power, pressure, charge, resistance.