Metric prefix

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Metric prefixes in everyday uise
Text Seembol Factor
exa E 1000000000000000000
peta P 1000000000000000
tera T 1000000000000
giga G 1000000000
mega M 1000000
kilo k 1000
hecto h 100
deca da 10
(none) (none) 1
deci d 0.1
centi c 0.01
milli m 0.001
micro μ 0.000001
nano n 0.000000001
pico p 0.000000000001
femto f 0.000000000000001
atto a 0.000000000000000001

A metric prefix is a unit prefix that precedes a basic unit o meisur tae indicate a multiple or fraction o the unit.