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There are 25.4 millimeters in one inch. Therefore to get amount of inches in millimeters, value in millimeters has to be divided by amount of millimeters in one inch:
4.5 millimeters = [millimeters] / 25.4 = 4.5 / 25.4 = 0.1772 inches

Direct Conversion Formula
4.5

mm

*

1 in


25.4 mm

=

0.1771653543

in

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12y ago

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