Easily convert more than 700 units and unit combinations in 20 categories. Available categories are: temperature, number system (binary, octal, decimal,...), angle (deg, rad,...), length, area, volume, time, frequency, speed, acceleration, mass, density, force, moment, force per length & area, power, energy, mass- & volume flux. UnitConverter can be started within a popup-window in your browser. The code is well documented and it is easy to add your own categories and units. A public help-forum is provided.