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The SI series of prefixes is used in a host of situations and in particular in electronics, RF design, connectivity and the like.

They are used to enable the various multiples of tens to be specified easily and accurately. With so many measures requiring vastly different multiples, it is necessary to notate them in an easy fashion.

For example, radio frequencies can range from a few kiloHertz, i.e. thousands of cycles per second through the MegaHertz and GigaHertz regions to TeraHerz , i.e. 10¹² cycles per second.

Also capacitance levels may range from a Farad or more (when super capacitors are used) down to picoFarads, i.e. 10^-12 Farads.

These prefixes and multipliers enable easy communication of measurements over vast ranges of magnitude.

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SI Prefixes & multipliers wall chart

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  Written by Ian Poole .
  Experienced electronics engineer and author.