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The micrometre (SI seembol: µm) or micrometer, an aa commonly kent as a micron, is an SI derived unit o lenth equalin 1×10−6 o a metre (SI staundart prefix "micro-" = 10−6); that is, ane millionth o a metre (or one thoosandth o a millimetre, 0.001 mm, or aboot 0.000039 inch).[1]

Cfaser haarrp.jpg
a 6 μm diameter carbon filament,
compared to 50 μm diameter human hair
Unit information
Unit seestem metric
Unit o length
Seembol μm 
Unit conversions
1 μm in ...... is equal tae ...
   SI units    1×10−6 m
   Naitural units    6.1877×1028 P
1.8897×104 a0
   imperial/US units    3.2808×10−6 ft
 3.9370×10−5 in


  1. "micrometre". Encyclopedia Britannica Online. Retrieved 18 May 2014.