A.3 Metric Prefixes

Multiplication factor Scientific Notation Prefix Symbol

1,000,000,000,000,000,000

1018

exa

E

1,000,000,000,000,000

1015

peta

P

1,000,000,000,000

1012

tera

T

1,000,000,000

109

giga

G

1,000,000

106

mega

M

1,000

103

kilo

k

100

102

hecto

h

10

101

deka

da

1

100



0.1

10–1

deci

d

0.01

10–2

centi

c

0.001

10–3

milli

m

0.000001

10–6

micro

μ

0.000000001

10–9

nano

n

0.000000000001

10–12

pico

p

0.000000000000001

10–15

femto

f

0.000000000000000001

10–18

atto

a