Practical Electronics/Tables

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Both very large and very small numbers are common in electronic. To simplify writing these numbers there are several prefixes (known as metric prefixes) used to multiply the values of components. These values are shown in the table below.

Text Symbol Factor
Peta P 1000000000000000
Tera T 1000000000000
Giga G 1000000000
Mega M 1000000
Kilo k 1000
(none) (none) 1
Mili m 0.001
Micro μ 0.000001
Nano n 0.000000001
Femto f 0.000000000001

These prefixes are added before the units that describe a quantity and are case sensitive (mW does not equal MW).