         Metric prefixes are pretty easy to understand and very handy for metric conversions. You don't have to know the nature of a unit to convert,
for example, from kilo-unit to mega-unit. You either multiply or divide by a power of ten. All metric prefixes indicate powers of 10. The most
commonly used prefixes
are highlighted in bold in the table. Most people even in the countries where metric system is only used, only know
the most commonly used metric prefixes like 'kilo' and 'milli'. The prefixes like 'zepto' or 'yotta' are very specific and used mostly in science.

PrexisSymbolFactor
yottaY1024 = 1,000,000,000,000,000,000,000,000
zettaZ1021 = 1,000,000,000,000,000,000,000
exaE1018 = 1,000,000,000,000,000,000
petaP1015 = 1,000,000,000,000,000
teraT1012 = 1,000,000,000,000
gigaG109 = 1,000,000,000
megaM106 = 1,000,000
kilok103 = 1,000
hectoh102 = 100
dekada101 = 10
decid10-1 = 0.1
centic10-2 = 0.01
millim10-3 = 0.001
microµ10-6 = 0.000,001
nanon10-9 = 0.000,000,001
picop10-12 = 0,000,000,000,001
femtof10-15 = 0.000,000,000,000,001
attoa10-18 = 0.000,000,000,000,000,001
zeptoz10-21 = 0.000,000,000,000,000,000,001
yoctoy10-24 = 0.000,000,000,000,000,000,000,001