There are seven so called &quot;base units&quot; defined in the SI; meter, second, mol, ampere, kelvin, candela and kilogram [1].<p>Of these, mole and kilogram are dependent of the kilogram.<p>edit: this is a good, if maybe a bit misleading, illustration: <a href="http:&#x2F;&#x2F;www.nist.gov&#x2F;pml&#x2F;wmd&#x2F;metric&#x2F;upload&#x2F;SI_Diagram_Color_April_2008-2.pdf" rel="nofollow">http:&#x2F;&#x2F;www.nist.gov&#x2F;pml&#x2F;wmd&#x2F;metric&#x2F;upload&#x2F;SI_Diagram_Color_A...</a><p>[1]: <a href="http:&#x2F;&#x2F;www.nist.gov&#x2F;pml&#x2F;wmd&#x2F;metric&#x2F;si-units.cfm" rel="nofollow">http:&#x2F;&#x2F;www.nist.gov&#x2F;pml&#x2F;wmd&#x2F;metric&#x2F;si-units.cfm</a>