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Length/Distance | Convert from zettameter to span |
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Common Length Conversions Metric Length Conversions 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. Unit Definition (span) Span is the width of a human hand, from the tip of the thumb to the tip of the pinky finger.
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