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Millimeters to Inches - Inches to Millimeters Converter

Convert mm to inches and inches to mm

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Mm - Inch Conversion


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Formula for Millimeters to Inches and Inches to Millimeters

How much is 1 inch in mm (inches to mm)

  • 1 inch = mm * 25.4

To convert millimeters to inches, divide by 25.4.

For example, 10 millimeters is equal to 10 / 25.4 = 0.3937 inches.


How much is 1 mm in inches (mm to inches)

  • 1 mm = inch / 25.4

To convert inches to millimeters, multiply by 25.4.

For example, 1 inch is equal to 1 * 25.4 = 25.4 millimeters.

Know more about Millimeter and Inches

Millimeter and Inches Icon
  • The millimeter is the base unit of length in the International System of Units (SI), while the inch is a unit of length in the imperial and customary units of measurement systems.

  • One millimeter is equal to 0.03937 inches, and one inch is equal to 25.4 millimeters.

  • Millimeters are used in most of the world to measure small objects, such as screws, nails, and electronic components.
  • Inches are still commonly used in the United States and the United Kingdom to measure larger objects, such as lumber, furniture, and clothing.
  • There are a few interesting points about the history of the millimeter and the inch. The millimeter was first defined in 1793, based on one ten-millionth of the distance from the North Pole to the equator.
  • The inch, on the other hand, has a much longer history, dating back to the ancient Romans. The Roman inch was defined as the width of three barleycorns.
  • Here are some other interesting facts about millimeters and inches:
  • The average human red blood cell is about 7.5 micrometers in diameter, which is about 0.03 inches.
  • The thickness of a human hair is about 100 micrometers, which is about 0.004 inches.
  • The average length of a dollar bill is 6.14 inches, or 155.95 millimeters.
  • The average height of an adult male in the United States is 5 feet 9 inches, or 175.3 centimeters.
  • The average height of an adult female in the United States is 5 feet 4 inches, or 162.6 centimeters.
  • Millimeters and inches are both units of length, but they are used in different parts of the world and for different purposes.
  • Millimeters are used in most of the world to measure small objects, such as screws, nails, electronic components, and the thickness of paper. They are also used to measure medical measurements, such as the size of tumors and the thickness of skin.
  • Inches are still commonly used in the United States and the United Kingdom to measure larger objects, such as lumber, furniture, clothing, and the height and weight of people. They are also used in the automotive industry to measure tire sizes and engine displacement.
  • Here are some examples of where millimeters and inches are used:
  • Millimeters:
  • The thickness of a sheet of paper
  • The diameter of a screw
  • The size of a computer chip
  • The thickness of a human hair
  • The size of a tumor
  • Inches:
  • The height of a person
  • The length of a piece of lumber
  • The width of a TV screen
  • The diameter of a wheel
  • The size of a shoe
  • It is important to be able to convert between millimeters and inches, especially if you work in a field where both units of measurement are used.
  • The mm-inch conversion tool in this page makes it easy to quickly convert from mm to inch or inch to mm.

Note: The above content has inputs from Bard , the AI Model from Google

Millimeter to Inches (mm to inches) Conversion table

Millimeter (mm)

Inches (in)

1 mm

0.039 inches

2 mm

0.079 inches

3 mm

0.118 inches

4 mm

0.157 inches

5 mm

0.197 inches

6 mm

0.236 inches

7 mm

0.276 inches

8 mm

0.315 inches

9 mm

0.354 inches

10 mm

0.394 inches

12 mm

0.472 inches

15 mm

0.591 inches

16 mm

0.63 inches

17 mm

0.669 inches

18 mm

0.709 inches

20 mm

0.787 inches

22 mm

0.866 inches

25 mm

0.984 inches

28 mm

1.102 inches

29 mm

1.142 inches

30 mm

1.181 inches

31 mm

1.22 inches

32 mm

1.26 inches

33 mm

1.299 inches

34 mm

1.339 inches

35 mm

1.378 inches

36 mm

1.417 inches

37 mm

1.457 inches

38 mm

1.496 inches

39 mm

1.535 inches

40 mm

1.575 inches

41 mm

1.614 inches

42 mm

1.654 inches

43 mm

1.693 inches

44 mm

1.732 inches

45 mm

1.772 inches

46 mm

1.811 inches

47 mm

1.85 inches

48 mm

1.89 inches

49 mm

1.929 inches

50 mm

1.969 inches

53 mm

2.087 inches

55 mm

2.165 inches

57 mm

2.244 inches

60 mm

2.362 inches

64 mm

2.52 inches

65 mm

2.559 inches

70 mm

2.756 inches

75 mm

2.953 inches

80 mm

3.15 inches

85 mm

3.346 inches

90 mm

3.543 inches

100 mm

3.937 inches

104 mm

4.094 inches

105 mm

4.134 inches

110 mm

4.331 inches

120 mm

4.724 inches

125 mm

4.921 inches

128 mm

5.039 inches

130 mm

5.118 inches

140 mm

5.512 inches

150 mm

5.906 inches

155 mm

6.102 inches

160 mm

6.299 inches

175 mm

6.89 inches

180 mm

7.087 inches

200 mm

7.874 inches

220 mm

8.661 inches

235 mm

9.252 inches

250 mm

9.843 inches

280 mm

11.024 inches

300 mm

11.811 inches

320 mm

12.598 inches

330 mm

12.992 inches

400 mm

15.748 inches

600 mm

23.622 inches

650 mm

25.591 inches

700 mm

27.559 inches

800 mm

31.496 inches

900 mm

35.433 inches

1000 mm

39.37 inches

1100 mm

43.307 inches

1200 mm

47.244 inches

1400 mm

55.118 inches

1500 mm

59.055 inches

1600 mm

62.992 inches

1800 mm

70.866 inches

2000 mm

78.74 inches

2400 mm

94.488 inches

3000 mm

118.11 inches

5000 mm

196.85 inches

Inches to Millimeter (inches to mm) Conversion table

Inches (in)

Millimeter (mm)

0.125 inches (1/16 in)

3.175 mm

0.25 inches (1/4 in)

6.35 mm

0.5 inches (1/2 in)

12.7 mm

0.75 inches (3/4 in)

19.05 mm

1 inch

25.4 mm

1.125 inches (1 1/16 in)

28.575 mm

1.25 inches (1 1/4 in)

31.75 mm

1.375 (1 3/8 in)

34.925 mm

1.5 inches (1 1/2 inch)

38.1 mm

1.75 inches (1 3/4 inch)

44.45 mm

2 inches

50.8 mm

2.5 inches (2 1/2 in)

63.5 mm

3 inches

76.2 mm

3.5 inches (3 1/2 in)

88.9 mm

3.75 inches (3 3/4 in)

95.25 mm

4 inches

101.6 mm

4.25 inches (4 1/4 in)

107.95 mm

4.5 inches (4 1/2 inch)

114.3 mm

4.75 inches (4 3/4 in)

120.65 mm

5 inches

127 mm

5.25 inches (5 1/4 in)

133.35 mm

5.5 inches (5 1/2 inch)

139.7 mm

5.75 inches (5 3/4 in)

146.05 mm

6 inches

152.4 mm

6.25 inches (6 1/4 in)

158.75 mm

6.5 inches (6 1/2 inch)

165.1 mm

6.75 inches (6 3/4 in)

171.45 mm

7 inches

177.8 mm

7.5 inches (7 1/2 inch)

190.5 mm

8 inches

203.2 mm

8.5 inches (8 1/2 inch)

215.9 mm

9 inches

228.6 mm

9.5 inches (9 1/2 inch)

241.3 mm

10 inches

254 mm

10.5 inches (10 1/2 inch)

266.7 mm

11 inches

279.4 mm

11.5 inches (11 1/2 inch)

292.1 mm

12 inches

304.8 mm

12.5 inches (12 1/2 inch)

317.5 mm

13 inches

330.2 mm

13.5 inches (13 1/2 inch)

342.9 mm

14 inches

355.6 mm

14.5 inches (14 1/2 inch)

368.3 mm

15 inches

381 mm

16 inches

406.4 mm

17 inches

431.8 mm

18 inches

457.2 mm

19 inches

482.6 mm

20 inches

508 mm

25 inches

635 mm

30 inches

762 mm

31 inches

787.4 mm

32 inches

812.8 mm

33 inches

838.2 mm

34 inches

863.6 mm

35 inches

889 mm

40 inches

1016 mm

50 inches

1270 mm

55 inches

1397 mm

58 inches

1473.2 mm

60 inches

1524 mm

75 inches

1905 mm

100 inches

2540 mm

125 inches

3175 mm

150 inches

3810 mm

200 inches

5080 mm

Frequently Asked Questions on Converting Inches to mm and mm to Inches

FAQ icon

  • It is a unit of length in imperial system

  • mm stands for millimeter. It is a unit of length in metric system. It is used to measure very small lengths.

  • Inch is bigger than mm. Inch is 25.4 times bigger than mm.

  • Metric system is mm, cm, meter . To convert inches to metric, you have to convert to cm, mm and meter 1 inch = 2.54 cm . 1 inch = 25.4 mm . 1 inch = 0.0254 m .

  • 1 inch to mm is 25.4 mm . To convert mm to inch, multiply mm by 25.4 for example, 2.5 inches to mm is 63.5 mm. 12 inches to mm is 304.8 mm. 2 inches to mm is 50.8 mm. 38 inches in mm is 965.2 mm. 1.5 inches to mm is 38.1 mm. 3 inches to mm is 76.2 mm. 5 inches to mm is 127 mm. 58 inches to mm is 1473.2 mm. 4 inches to mm is 101.6 mm

  • 1mm to inches is 0.039 in. Multiply inches by 0.039 to get mm. Example: 2.5 mm to inch is 0.1 in. 7 mm to inches is 0.276 in. 400mm to inches is 15.748 in. 4mm to inches is 0.157 in. 80mm to inches is 3.15 in. 45mm to inches is 1.772 in. 32mm to inches is 1.26 in. 22mm to inches is 0.866 in. 15 mm in inches is 0.591 in. 9mm in inches is 0.354 in.

  • 0.315 in

  • 1.181 in

  • 0.394 in

  • 3.937 in

  • 0.472 in

  • 0.787 in

  • 0.197 in