One inch is equal to 25.4 mm
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One inch is 2.54 cms or 254 mms 12 inches in a foot, so one foot is 30.48cms or 3048 mms.
410000
in 1000 cms there are 10000 mms
0.00500 of a meter (There are 1000 mms in a Mtr.)
If you mean 3.4 mms or 30 mms then 30 is larger.