Mm to Inches Converter.

1 mm = 0.0393701 in, so 50 mm = 1.969 in. Type any value below to convert mm to inches instantly.

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Reference Table

mm	cm	m	km	in	ft	yd	mi	nmi
0.05	0.005	0.00005	5.000000e-8	0.0019685039	0.000164042	0.0000546807	3.106856e-8	2.699784e-8
0.5	0.05	0.0005	5.000000e-7	0.0196850394	0.0016404199	0.0005468066	3.106856e-7	2.699784e-7
5	0.5	0.005	0.000005	0.1968503937	0.0164041995	0.0054680665	0.0000031069	0.0000026998
50	5	0.05	0.00005	1.968504	0.1640419948	0.0546806649	0.0000310686	0.0000269978
500	50	0.5	0.0005	19.685039	1.64042	0.5468066492	0.0003106856	0.0002699784
5000	500	5	0.005	196.850394	16.404199	5.468066	0.003106856	0.002699784
50000	5000	50	0.05	1968.5039	164.041995	54.680665	0.0310685596	0.0269978402

How to convert mm to inches

Formula.inches = millimetres ÷ 25.4.

Relationship.1 mm = 0.0393701 in.

Worked example. 50 mm = 1.969 in.

mm to inches conversion table

mm	in
1	0.0393700787
2	0.0787401575
3	0.1181102362
4	0.157480315
5	0.1968503937
6	0.2362204724
8	0.3149606299
10	0.3937007874
12	0.4724409449
15	0.5905511811
20	0.7874015748
25	0.9842519685
30	1.181102
40	1.574803
50	1.968504
60	2.362205
70	2.755906
75	2.952756
80	3.149606
90	3.543307
100	3.937008
120	4.724409
150	5.905512
200	7.874016
250	9.84252

Frequently Asked Questions

How do I convert millimetres to inches?

Divide millimetres by 25.4, since 1 inch = 25.4 mm exactly. For example, 50 mm ÷ 25.4 ≈ 1.97 inches.

How many inches is 100 mm?

100 mm equals 3.94 inches (100 ÷ 25.4).

What is 25 mm in inches?

25 mm is 0.984 inches — almost exactly one inch, which is 25.4 mm.

Why use mm-to-inch conversion?

Engineering drawings, hardware, screen bezels and woodworking tools are often dimensioned in millimetres, while many tools and fasteners are sold in inches.