[markild]

There are seven so called "base units" defined in the SI; meter, second, mol, ampere, kelvin, candela and kilogram [1].

Of these, mole and kilogram are dependent of the kilogram.

edit: this is a good, if maybe a bit misleading, illustration: http://www.nist.gov/pml/wmd/metric/upload/SI_Diagram_Color_A...

[1]: http://www.nist.gov/pml/wmd/metric/si-units.cfm

[jessaustin]

The NIST chart is interesting. I'm surprised that charge is defined in terms of current, rather than the other way around.

[delecti]

> Of these, mole and kilogram are dependent of the kilogram.

Did you make a typo? While it's technically true that the kilogram is defined by the definition of the kilogram, I just wanted to make sure.

[markild]

Not a typo, but maybe a bit vague. I meant to say that the SI units both are dependant on the real world kilogram object.