The International System of Units (SI)

 

The International System of Units (SI) 

The International System of Units (in French Le Systeme International d’Unites– abbreviated as SI) was established by the 11th General Conference on Weights and  Measures (CGPM from ConferenceGenerale des Poids at Measures). The SI system  has seven base units 

Prefixes in SI system 

Multiple Prefix Symbol

10^-12 

pico 

p

10^-9

nano 

n

10^-6 micro 

µ

10^-3 

milli 

m

10^-2

centi 

c

10^-1

deci 

d

10 

deca 

da

10²hecto 

h

10³

kilo 

k

10⁶ 

mega 

M

10⁹

giga 

G

10¹² 

tera 

T