GlobeConvert gives conversion in eleven different categories: area, currency, energy, length, power, pressure, speed, temperature, time, volume, and weight.
Once you have selected the category in which you wish to convert, the conversion page will display. Simply choose the denomination you want to start with and the denomination you want to convert into. After you input your value, GlobeConvert gives you the conversion almost immediately.
If you find yourself consistently using a specific conversion, you can "favorite" that conversion for easier access later.