Editing Metric system (section)

==Multiplicative prefixes==
{{Main|Metric prefix}}

In the SI system and generally in older metric systems, multiples and fractions of a unit can be described via a prefix on a unit name that implies a decimal (base-10), multiplicative factor. The only exceptions are for the SI-accepted units of time (minute and hour) and angle (degree, arcminute, arcsecond) which, based on ancient convention, use base-60 multipliers.<ref>{{cite web |title=Non-SI units accepted for use with SI |url=https://metricsystem.net/non-si-units/accepted-for-use-with-si/ |website=Metric System |date=26 July 2018 |access-date=10 July 2023}}</ref>
{{common metric prefixes}}
The prefix ''kilo'', for example, implies a factor of 1000 (10<sup>3</sup>), and the prefix ''milli'' implies a factor of 1/1000 (10<sup>−3</sup>). Thus, a ''kilometre'' is a thousand metres, and a ''milligram'' is one thousandth of a gram. These relations can be written symbolically as:<ref name=SI_prefix>{{SIbrochure8th|pages=121,122}}</ref>
{{block indent|1=1&nbsp;km = 1000&nbsp;m}}
{{block indent|1=1&nbsp;mg = 0.001&nbsp;g}}