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Unit prefixes are the symbols placed before the symbol of a unit to specify the order of magnitude of the quantity.
They are useful to express very large and very small quantities.
Example:
\(k\) (\(kilo\)) is the unit prefix in the unit, \(Kilometre\).
A unit prefix stands for a specific positive or negative power of 10. Some unit prefixes are given in the table.
Power of 10 | Prefix | Symbol |
peta | P | |
tera | T | |
giga | G | |
mega | M | |
kilo | k | |
hecto | h | |
deca | da | |
deci | d | |
centi | c | |
milli | m | |
micro | ||
nano | n | |
pico | p | |
femto | f |
Unit Prefixes
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