How do you abbreviate "Millions"?

Question

M or MM? I prefer "M" -- it's shorter, but someone here was pushing for "MM".

I don't think that this is on-topic, but I will wait for others to vote to close it. — Shane, Oct 25 '10 at 20:29
Plenty of answers are at http://www.google.com/search?q=abbreviate+millions . — whuber, Oct 25 '10 at 20:40

score 1 · Accepted Answer · answered Oct 25 '10 at 21:13

1

I would use M, as it is the SI prefix for million (mega-).

answered Oct 25 '10 at 21:13

nico

score 1 · Answer 2 · answered Oct 25 '10 at 21:39

1

I would use "million", or 10^6, because M stands for molar (concentration in moles per litre) in my discipline.

answered Oct 25 '10 at 21:39

Michael Lew

2

I cannot think of any situation in which molar can be confused with "millions". Millions is not generally used by itself, you usually write, for instance, 2M€, 2Mb or 2MΩ. Moreover, you use Molar next to a chemical name, es. CaCl2 0.5M, so there is no ambiguity. – nico Oct 25 '10 at 21:44
+1 for scientific notation - the clear, simple and widely used approach. – Tim Jan 11 '15 at 19:51

2 Answers2