Definition:Metric System

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The metric system is the colloquial term for the system of measurement based on the metre.

Its main characteristic is that its units are constructed on a decimal system.

Metric Scaling Prefixes

Standard prefixes for the SI units of measure
Multiples Name deka- hecto- kilo- mega- giga- tera- peta- exa- zetta- yotta-
Symbol $\mathrm{da}$ $\mathrm h$ $\mathrm k$ $\mathrm M$ $\mathrm G$ $\mathrm T$ $\mathrm P$ $\mathrm E$ $\mathrm Z$ $\mathrm Y$
Factor $10^0$ $10^1$ $10^2$ $10^3$ $10^6$ $10^9$ $10^{12}$ $10^{15}$ $10^{18}$ $10^{21}$ $10^{24}$
Subdivisions Name deci- centi- milli- micro- nano- pico- femto- atto- zepto- yocto-
Symbol $\mathrm d$ $\mathrm c$ $\mathrm m$ $\mu$ $\mathrm n$ $\mathrm p$ $\mathrm f$ $\mathrm a$ $\mathrm z$ $\mathrm y$
Factor $10^0$ $10^{-1}$ $10^{-2}$ $10^{-3}$ $10^{-6}$ $10^{-9}$ $10^{-12}$ $10^{-15}$ $10^{-18}$ $10^{-21}$ $10^{-24}$

Also see

Historical Note

Definition:Metric System/Historical Note