UnitKit is a tool for conversion of units. The version 2.0 included 1118 different units in 54 categories.

It is designed for students, teachers, and people who are working in
scientific, and technical areas. Most units are in common use, but
it also contains very specialized units and categories.

The categories include
Basic: Length, Mass / Weight, Time, Angle (Plane), Angle (Solid), Area, Density, Volume / Capacity;
Mechanics: Acceleration (Angular), Acceleration (Linear), Energy, Force, Power, Pressure, Speed (Angular), Speed (Linear), Torque;
Fluid: Fuel efficiency, Surface Tension;
Heat: Entropy, Heat Capacity, Heating Value, Specific Heat, Temperature;
Acoustics: Sound;
Electromagnetism: Capacitance, Charge, Conductance, Conductivity, Current, Electric field, Frequency / Wavelength, Magnetic Field, Magnetic Flux, Magnetic Flux Density, Magnetomotive Force, Resistance, Voltage;
Optics: Illuminance, Luminous Intensity;
Radiology: Absorbed Dose, Absorbed Dose Rate, Activity, Equivalent Absorbed Dose (Old),
Equivalent Absorbed Dose (SI), Exposure;
Chemistry: Concentralation (Liquid Solution), Concentralation (Molar), Henry's Law Constants;
Computer: Data storage, Data transfer, Digital Image Resolution;
Typograph: Length;
Economics: EU Currency.

It has remarkable features :
1. Easy to use, simple to operate, response quickly.
2. For every unit its defination or explanation is given with
its source. It is possible to do cross check within the UnitKit.
3. The abbreviation or symbol (if it has) of unit is displayed.
4. For some derived units the conversion coefficients are given.
5. A calculator with double precision is given for checking the
correctness of conversion coefficients.