Converge is a powerful utility that will help you easily make conversions between 1208 various units of measurements in 32 categories such as; physical, chemical, computational and many more. The conversion files can be updated if necessary and if you want you can install it on your USB memory.
It is certainly a great tool for both college and university students. Its installation file weighs only 332 KB, it is a multilanguage application, and best of all it is free.