Millimeters
The millimetre is a unit of length in the metric system, equivalent to one thousandth of a metre (the SI base unit of length).
m =
mm
______
1000.0
Meters
The metre is a unit of length in the metric system, and is the base unit of length in the International System of Units (SI).
As the base unit of length in the SI and other m.k.s. systems (based around metres, kilograms and seconds) the metre is used to help derive other units of measurement such as the newton, for force.
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