SI Prefix Usage Debate
Comments discuss inconsistencies in using SI prefixes like mega- (Mg for megagram/tonne) versus common notations such as k kg or tonne, and parallels to financial abbreviations like K for thousand and M/MM for million.
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(Why is 1000 a k for kilo, but a million is MM, not M for mega?)
Just use kk (kilo*kilo) for million :) everybody is happy?
What's wrong with saying "tonne" instead of "billion grams"
perhaps we should use kilo-millions?
that's why the correct unit here would be megakilograms :)
please stop using "MM" it's not in line with decimal prefixes and unnecessarily confusing
Same reason for we say 1000 km instead of 1 Mm, or Sun to Earth 150 M km instead of 150 Gm. Some units are usual in some contexts, some are not. In one word, habits.
America largely uses K,M,BEither OP is incorrect, or not American
We need more uses of long and short - a kilometer is a short mile, a kilogram is a long pound, etc.
Tera/giga are globally standardized; trillion/billion are ambiguous.