A.3 Metric Prefixes

Multiplication factor Scientific Notation Prefix Symbol
1,000,000,000,000,000,000 1018 exa E
1,000,000,000,000,000 1015 peta P
1,000,000,000,000 1012 tera T
1,000,000,000 109 giga G
1,000,000 106 mega M
1,000 103 kilo k
100 102 hecto h
10 101 deka da
1 100

0.1 10–1 deci d
0.01 10–2 centi c
0.001 10–3 milli m
0.000001 10–6 micro μ
0.000000001 10–9 nano n
0.000000000001 10–12 pico p
0.000000000000001 10–15 femto f
0.000000000000000001 10–18 atto a