Common Metric System Prefixes with Their Symbols and Mathematical Meanings

micro-

u (Greek mu)= 0.000001 (10^-6, one-millionth)

giga-

G = 1,000,000,000 (10^9, billion)

mega-

M = 1,000,000 (10^6, million)

centi-

c = 0.01 (10^-2, one-hundredth)

deci-

d = 0.1 (10^-1, one-tenth)

kilo-

k = 1000 (10^3, thousand)

milli-

m = 0.001 (10^-3, one-thousandth)

nano-

n = 0.000000001 (10^-9, one-billionth)

pico-

p = 0.000000000001 (10^-12, one-trillionth)