How do you convert millimeters to inches?

To convert millimeters to inches, multiply by 0.03937007874. For example, 31 mm is 1.220472 in.

How many inches are in a millimeter?

There are 0.03937007874 inches in one millimeter.

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Converters · Length

31 Millimeters to Inches

31 mm =

1.220472 in

31 millimeters equals 1.220472 inches

How to convert millimeters to inches

To get inches, multiply by 0.03937007874.

in = mm × 0.03937007874

Worked example: 31 × 0.03937007874 = 1.220472 in.

Going the other way, multiply by 25.4 — one inch is 25.4 millimeters.

Values near 31 mm

Millimeter	Inch
15.5 mm	0.610236 in
29 mm	1.141732 in
30 mm	1.181102 in
32 mm	1.259843 in
33 mm	1.299213 in
62 mm	2.440945 in

Millimeter to Inch — common values

Millimeter	Inch
1 mm	0.03937 in
2 mm	0.07874 in
3 mm	0.11811 in
5 mm	0.19685 in
10 mm	0.393701 in
25 mm	0.984252 in
50 mm	1.968504 in
100 mm	3.937008 in

Convert Millimeter to other units

mm → m mm → km mm → cm mm → mi mm → yd mm → ft mm → in mm → nmi

← Reverse: Inch to Millimeter

Questions

How do you convert millimeters to inches?: To convert millimeters to inches, multiply by 0.03937007874. For example, 31 mm is 1.220472 in.
How many inches are in a millimeter?: There are 0.03937007874 inches in one millimeter.
How do you convert inches back to millimeters?: Go the other way: multiply by 25.4. One inch is 25.4 millimeters.

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