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Length/Distance | Convert from millimeter to zettameter |
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Common Length Conversions Metric Length Conversions Unit Definition (millimeter) The millimeter (or millimetre) is one of the most common metric units of distance. One millimeter is exactly one thousandth of a meter. The millimeter is also an engineering standard unit. Unit Definition (zettameter) The zettametre (or zettameter), symbol: Zm, is an SI metric unit of length. 1 zettametre is equal to 1e+21 metres, a very large distance. Not to be confused with a zeptometre.
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