List Of Number Abbreviations

Here is a list of number abbreviations. It’s worth noting these abbreviations are not always used consistently, and can sometimes be used with or without periods. For example, both “M” and “M.” can be used to represent “million,” and both “K” and “K.” can be used to represent “thousand.”

M: Million
MM: Million (in financial contexts)
B: Billion
T: Trillion
K: Thousand
KK: Thousand (in financial contexts)
m: Milli- (one thousandth)
u: Micro- (one millionth)
n: Nano- (one billionth)
p: Pico- (one trillionth)
f: Femto- (one quadrillionth)
a: Atto- (one quintillionth)