The Physics
Hypertextbook
Opus in profectus

International System of Units

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Summary

Fundamental units of the International System
quantity unit symbol
length meter m
mass kilogram kg
time second s
electric current ampère A
temperature kelvin K
amount of substance mole  mol 
luminous intensity candela cd
Divisions of the International System
factor prefix symbol
10−1 deci d
10−2 centi c
10−3 milli m
10−6 micro µ
10−9 nano n
10−12 pico p
10−15 femto f
10−18 atto a
10−21 zepto z
10−24 yocto y
Multiples of the International System
factor prefix symbol
101 deca da
102 hecto h
103 kilo k
106 mega M
109 giga G
1012 tera T
1015 peta P
1018 exa E
1021 zetta Z
1024 yotta Y