Mega-
M (10^6)
Kilo-
K (10^3)
Deca-
da (10^1)
Deci-
d (10^-1)
Centi-
c (10^-2)
milli-
m (10^-3)
micro-
Greek letter “mu” looks like a u
10^-6
Nano-
n (10^-9)
tera-
T (10^12)
giga-
G (10^9)
Pico-
p (10^-12)
Hecto-
h (10^2)
Femto-
f (10^-15) quadrillionth