Reply by Bohaiboy

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Posted on Millimeters to Fractional Inches Conversion

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76 posts in 3034 days

#1 posted 10-04-2017 05:49 PM

I have lived in numerous countries and all but US use metric. Metric is easy, so much easier than imperial. Unfortunately, as Americans, we are always trying to convert from metric back to imperial. For instance, if a cutout calls for 72 mm, we are scratching our heads to try to think how many 1/8 or 1/16th that will be versus taking it as an absolute. If I need to have 72 mm, it is very easy, it is 36 mm, 1/2 is 18 mm and so on. Whereas 72 mm is 2.835”, the fractional portion lies somewhere between 13/16 and 7/8” (14/16”) But then trying to divide those by 2 or 4 creates additional math headaches.

Think of it this way, what size is your car engine? I bet it is in liters of displacement and no one even considers converting that to cu. in. the way engines used to be. JMTCW.

-- Tim, Houston, TX area

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