Metric prefix

List of SI prefixes

quetta Q 1030 1000000000000000000000000000000 2022 ronna R 1027 1000000000000000000000000000 yotta Y 1024 1000000000000000000000000 1991 zetta Z 1021 1000000000000000000000 exa E 1018 1000000000000000000 1975 peta P 1015 1000000000000000 tera T 1012 1000000000000 1960 giga G 109 1000000000 mega M 106 1000000 1873 kilo k 103 1000 1795 hecto h 102 100 deca da 101 10 — — 100 1 — deci d 10−1 0.1 1795 centi c 10−2 0.01 milli m 10−3 0.001 micro μ 10−6 0.000001 1873 nano n 10−9 0.000000001 1960 pico p 10−12 0.000000000001 femto f 10−15 0.000000000000001 1964 atto a 10−18 0.000000000000000001 zepto z 10−21 0.000000000000000000001 1991 yocto y 10−24 0.000000000000000000000001 ronto r 10−27 0.000000000000000000000000001 2022 quecto q 10−30 0.000000000000000000000000000001