Metric prefixes are the symbols or letters used before the metric unit. The main use of metric prefix is to write the numerical value in a convenient way.
Metric prefixes are almost used when the numeric value is very high or very less.
Prefix |
Symbol | Prefix Value | |
yotta | Y | 10^{24} | |
zetta | Z | 10^{21} | |
exa | E | 10^{18} | |
peta | P | 10^{15} | |
tera | T | 10^{12} | |
giga | G | 10^{9} | |
mega | M | 10^{6} | |
kilo | k | 10^{3} | |
hecto | h | 10^{2} | |
deca | da | 10^{1} | |
10^{0} | |||
deci | d | 10^{-1} | |
centi | c | 10^{-2} | |
milli | m | 10^{-3} | |
micro | μ | 10^{-6} | |
nano | n | 10^{-9} | |
pico | p | 10^{-12} | |
femto | f | 10^{-15} | |
atto | a | 10^{-18} | |
zepto | z | 10^{-21} | |
yocto | y | 10^{-24} |
Metric Prefixes Examples :
Youngs Modulus = 210 Mpa
Wave length = 10 μm
Diameter = 10 mm or 1 cm
Don’t confuse with unit “mm” since the first “m” is metric prefix (milli) and the second “m” is SI unit (meter).