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Convert Inches to Millimeters

in\text{in}
=
mm\text{mm}

Inch (in)

A unit of length in the imperial and US customary systems.

Millimeter (mm)

A unit of length equal to one thousandth of a meter.

Inches to Millimeters Conversion Table

Inches (in)Millimeters (mm)
125.4
250.8
5127
10254
20508
501270
1002540
2506350
50012700
100025400

How to Convert Inches to Millimeters

Conversion factor:

1 in=25.4 mm1\,\text{in} = 25.4\,\text{mm}

Inverse factor:

1 mm=0.03937 in1\,\text{mm} = 0.03937\,\text{in}

Example

Convert 15 in to mm:

mm=in×25.4\text{mm} = \text{in} \times 25.4
mm=15×25.4\text{mm} = 15 \times 25.4
mm=381\text{mm} = 381
=381 mm= 381 \, \text{mm}

All conversions from Inches (in)