Millimetres to Inches (mm to in)

Convert millimetres to inches instantly. 1 millimetre = 0.0393700787 inches, so divide the number of millimetres by 25.4. Includes worked examples and a full mm to in table.

How to convert millimetres to inches

1 millimetre = 0.0393700787 inches and 1 inch = 25.4 millimetres. To convert millimetres to inches, divide by 25.4:

in = mm ÷ 25.4

Examples

  • 5 mm ÷ 25.4 = 0.1968503937 in
  • 10 mm ÷ 25.4 = 0.3937007874 in
  • 25 mm ÷ 25.4 = 0.9842519685 in

mm to in conversion table

Millimetres (mm)Inches (in)
1 mm0.0393700787 in
2 mm0.0787401575 in
3 mm0.1181102362 in
4 mm0.157480315 in
5 mm0.1968503937 in
6 mm0.2362204724 in
7 mm0.2755905512 in
8 mm0.3149606299 in
9 mm0.3543307087 in
10 mm0.3937007874 in
12 mm0.4724409449 in
15 mm0.5905511811 in
20 mm0.7874015748 in
25 mm0.9842519685 in
30 mm1.181102362 in
40 mm1.57480315 in
50 mm1.968503937 in
60 mm2.362204724 in
70 mm2.755905512 in
75 mm2.952755906 in
80 mm3.149606299 in
90 mm3.543307087 in
100 mm3.937007874 in
150 mm5.905511811 in
200 mm7.874015748 in
250 mm9.842519685 in
500 mm19.68503937 in
1,000 mm39.37007874 in
5,000 mm196.8503937 in
10,000 mm393.7007874 in

What is a millimetre?

A millimetre is one thousandth of a metre (0.001 m), used for precise measurements in engineering, construction drawings and rainfall.

What is an inch?

An inch is exactly 2.54 centimetres (since 1959). It is used for screen sizes, pipe and tyre sizes, and heights in feet and inches.

Related conversions

Inches to millimetresMillimetres to centimetresCentimetres to millimetresMillimetres to metresMetres to millimetresCentimetres to inchesInches to centimetresInches to feetFeet to inchesMetres to inchesInches to metresAll length units

Frequently asked questions

How do I convert millimetres to inches?

Divide the value in millimetres by 25.4. 1 millimetre = 0.0393700787 inches.

How many millimetres are in one inch?

1 inch = 25.4 millimetres.

What is 10 mm in in?

10 mm = 0.3937007874 in.

What is 25 mm in in?

25 mm = 0.9842519685 in.