The document lists various metric prefixes that are used to denote powers of 10 both above and below the base unit. It shows prefixes ranging from atto- (10-18) up to tera- (1012), along with their associated symbols, numerals, and terminology for describing the value. The prefixes allow quantities to be expressed in a normalized manner across many orders of magnitude.

1. Powers of 10
Factor Prefix Symbol Numeral Terminology
10-18 atto- a .000000000000000001 One quintillionth
10-15 femto- f .000000000000001 One quadrillionth
10-12 pico- p .000000000001 One trillionth
10-9 nano- n .000000001 One billionth
10-6 micro- µ .000001 One millionth
10-3 milli- m .001 One thousandth
10-2 centi- c .01 One one-hundredth
10-1 deci- d .1 One tenth
100 -- -- 1 One
101 deka- da 10 Ten
102 hecto- h 100 Hundred
103 kilo- k 1,000 Thousand
106 mega- M 1,000,000 Million
109 giga- G 1,000,000,000 Billion
1012 tera- T 1,000,000,000,000 Trillion
1,000,000,000,000,000,.. Terminology varies/
--
>1014 . non-existent