Inches to Millimeters Converter

Convert inches (in) to millimeters (mm) instantly. Type a value below; the result updates as you type. 1 in = 25.4 mm.

How to convert inches to millimeters

1 in = 25.4 mm. To convert inches to millimeters, multiply the value by 25.4.

millimeters = inches × 25.4

Worked examples

  • 5 in = 127 mm
  • 12 in = 304.8 mm
  • 100 in = 2,540 mm

Common inches to millimeters conversions

How many millimeters is 0.25 in?

0.25 in is equal to 6.35 mm.

How many millimeters is 0.5 in?

0.5 in is equal to 12.7 mm.

How many millimeters is 0.75 in?

0.75 in is equal to 19.05 mm.

How many millimeters is 1 in?

1 in is equal to 25.4 mm.

How many millimeters is 1.5 in?

1.5 in is equal to 38.1 mm.

How many millimeters is 2 in?

2 in is equal to 50.8 mm.

How many millimeters is 3 in?

3 in is equal to 76.2 mm.

How many millimeters is 4 in?

4 in is equal to 101.6 mm.

Inches to millimeters conversion table

Inches (in)Millimeters (mm)
0.25 in6.35 mm
0.5 in12.7 mm
0.75 in19.05 mm
1 in25.4 mm
1.5 in38.1 mm
2 in50.8 mm
3 in76.2 mm
4 in101.6 mm
5 in127 mm
6 in152.4 mm
7 in177.8 mm
8 in203.2 mm
9 in228.6 mm
10 in254 mm
15 in381 mm
20 in508 mm
25 in635 mm
30 in762 mm
40 in1,016 mm
50 in1,270 mm
75 in1,905 mm
100 in2,540 mm
250 in6,350 mm
500 in12,700 mm
1,000 in25,400 mm

Related conversions

Frequently asked questions

How many millimeters are in 1 inch?

1 inch (in) equals 25.4 millimeters (mm).

How do I convert inches to millimeters?

To convert inches to millimeters, multiply the value by 25.4. For example, 5 in = 127 mm.

How many inches are in 1 millimeter?

1 millimeter (mm) equals 0.0393701 inches (in).

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