Template:SI prefixes (infobox)

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Prefix Base 10 Decimal Adoption
[nb 1]
Name Symbol
quetta Q 1030 1000000000000000000000000000000 2022
ronna R 1027 1000000000000000000000000000 2022
yotta Y 1024 1000000000000000000000000 1991
zetta Z 1021 1000000000000000000000 1991
exa E 1018 1000000000000000000 1975
peta P 1015 1000000000000000 1975
tera T 1012 1000000000000 1960
giga G 109 1000000000 1960
mega M 106 1000000 1873
kilo k 103 1000 1795
hecto h 102 100 1795
deca da 101 10 1795
100 1
deci d 10−1 0.1 1795
centi c 10−2 0.01 1795
milli m 10−3 0.001 1795
micro μ 10−6 0.000001 1873
nano n 10−9 0.000000001 1960
pico p 10−12 0.000000000001 1960
femto f 10−15 0.000000000000001 1964
atto a 10−18 0.000000000000000001 1964
zepto z 10−21 0.000000000000000000001 1991
yocto y 10−24 0.000000000000000000000001 1991
ronto r 10−27 0.000000000000000000000000001 2022
quecto q 10−30 0.000000000000000000000000000001 2022
Notes
  1. ^ Prefixes adopted before 1960 already existed before SI. The introduction of the CGS system was in 1873.