This Javascript program makes possible the conversion between a large number of different units. The basic units are represented by mathematical symbols, which can be combined to yield more complicated expressions [like, for example, m/s, kg(m/s)^2, kcal/mol, hbar^2/(2 me), etc...]. As many physical constants are included, it is also possible to evaluate simple formulas involving these constants.

Other facilities, such as conversion to predefined systems of units (CGS, atomic units, ...) as well as special conversions (temperature/energy, mass/energy, ...) are also available.

The values of the physical constants are taken form The CODATA 2018 Internationally recommended values.

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