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Prefixes for Decimal Multiples of SI Units

Prefix Symbols Factor of Multiplication
peta P 1 000 000 000 000 000 = 1015
tera T 1 000 000 000 000 = 1012
giga G 1 000 000 000 = 109
mega M 1 000 000 = 106
kilo k 1 000 = 103
hecto h 100 = 102
deka da 10 = 101
deci d 0.1 = 10-1
centi c 0.01 = 10-2
milli m 0.001 = 10-3
micro µ 0.000 001 = 10-6
nano n 0.000 000 001 = 10-9