How many millimeters are in 1 inch?

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25.4 mm

1 inch — is 25.4 millimeters

How to convert 1 inch to millimeters?

The formula to convert inches to millimeters:

According to the formula, to convert 1 inch to millimeters, multiply 1 by 25.4:

1 in * 25.4 = 25.4 mm

Created by Alex Fedorov
Last updated : September 12, 2024