Use this free online calculator to convert Inch to Millimeter instantly. This common length conversions conversion tool provides accurate results for all your measurement needs.

Quick Reference

1 Inch = 25.4000 Millimeter

1 Millimeter = 0.039370 Inch

Inch to Millimeter Conversion Formula

To convert Inch to Millimeter, multiply by 25.4000.

Millimeter = Inch × 25.4000

Inch = Millimeter × 0.039370

To convert Millimeter back to Inch, divide by 25.4000 (or multiply by 0.039370).

About These Units

About Inch

The inch is a traditional measurement of distance equal to 1/12 of a foot, or exactly 2.54 centimeters. The Old English word "ynce" is derived from the Latin uncia, meaning a 1/12 part. It follows that "inch" and "ounce" actually have the same origin. The inch was originally defined in England in two ways: as the length of three barleycorns laid end to end, or as the width of a man's thumb at the base of the nail.

About Millimeter

1 millimetre = SI unitsrn1×10-3 m 0.1 cm The millimetre (American spelling: millimeter, symbol mm) is a unit of length in the metric system, equal to one thousandth of a metre, which is the current SI base unit of length.

Inch to Millimeter Conversion Table

Inch	Millimeter	Millimeter	Inch
0.1	2.5400	0.1	3.937e-3
0.5	12.7000	0.5	0.019685
1	25.4000	1	0.039370
2	50.8000	2	0.078740
5	127.0000	5	0.196850
10	254.0000	10	0.393701
20	508.0000	20	0.787402
25	635.0000	25	0.984252
50	1270.00	50	1.9685
100	2540.00	100	3.9370
250	6350.00	250	9.8425
500	12700.00	500	19.6850
1000	25400.00	1000	39.3701

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