By Oleksandr Koliakin

Prefixes for measurements are incredibly important. Here are the basic ones (the ones in **bold** are the most common):

x - any primary/basic unit (e.g. meters or seconds)

p(x) = pico(x) = 1/1000000000000th of (x) = 10^-12

n(x) = nano(x) = 1/1000000000th of (x) = 10^-9

μ(x) = micro(x) = 1/1000000th of (x) = 10^-6

**m(x) = milli(x) = 1/1000th of (x) = 10^-3**

**c(x) = centi(x) = 1/100th of (x) = 10^-2**

d(x) = deci(x) = 1/10th of (x) = 10^-1

(x)

**k(x) = kilo(x) = 1000(x) = 10^3**

M(x) = mega(x) = 1000000(x) = 10^6

G(x) = giga(x) = 1000000000(x) = 10^9

T(x) = terra(x) = 1000000000000(x) = 10^12

P(x) = peta(x) = 1000000000000000(x) = 10^15

Examples:

**kg = kilogram = 1000 grams**

**mm = millimeter = 1/1000th of a meter**