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SI Decimal Number Prefixes

 

The number system adopted by the International System of Units (Le Système International d´Uènits)

Symbol Prefix Exponent Factor
Yyotta10241 000 000 000 000 000 000 000 000
Zzetta10211 000 000 000 000 000 000 000
Eexa10181 000 000 000 000 000 000
Ppeta10151 000 000 000 000 000
Ttera10121 000 000 000 000
Ggiga1091 000 000 000
Mmega1061 000 000
mymyria10410 000 (obsolete)
kkilo1031 000
hhecto102100
dadeka
deca
10110
ddeci10-10.1
ccenti10-20.01
mmilli10-30.001
micro10-60.000 001
nnano10-90.000 000 001
ppico10-120.000 000 000 001
ffemto10-150.000 000 000 000 001
aatto10-180.000 000 000 000 000 001
zzepto10-210.000 000 000 000 000 000 001
y yocto 10-24 0.000 000 000 000 000 000 000 001

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