User talk:78.147.24.227

Why is the kilogram abbreviated to kg and not Kg? To be logical/consistent all those below 1g should be lower case eg mg milligram and all those above 1g should be upper case eg Mg megagram. The unexplained exceptions are dag, hg and kg. Why? Tim Mason. tim.mason@port.ac.uk

From Wikipaedia

10−1 g dg  decigram  101 g  dag  decagram 10−2 g cg  centigram  102 g  hg  hectogram 10−3 g mg  milligram   Eg  exagram 103 g kg  kilogram 10−6 g µg  microgram  106 g  Mg  megagram (tonne) 10−9 g ng  nanogram  109 g  Gg  gigagram 10−12 g pg  picogram  1012 g  Tg  teragram 10−15 g fg  femtogram  1015 g  Pg  petagram 10−18 g ag  attogram  1018 g 10−21 g  zg  zeptogram  1021 g  Zg  zettagram 10−24 g yg  yoctogram  1024 g  Yg  yottagram