3m = 3000mm
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1 meter = 1,000 millimeters 1 millimeter = 0.001 meter 3 millimeters = 0.003 meter
A 'micrometer' is a unit of length equal to one thousandth (10 -3) of a millimeter or one millionth (10 -6) of a meter. [For your information, - A 'nanometer' is a unit of length equal one thousandth (10 -3) of a micrometer, one millionth (10 -6) of a millimeter or to one billionth (10−9) of a meter].
One does not need a chart to convert meter to millimeter. It is a very simple conversion. 1000 millimeters make one meter. So one millimeter is 10-3 of a meter.
1 millimeter = 10-3 meter 1 micrometer = 10-6 meter = 10-3 millimeter There are 1,000 of them.
1 micrometer = .001 millimeter 1000 micrometers in one millimeter (mm) = 10^-3 (um) = 10^-6