Since **1 inch = 25.4 millimeters**, the **inches to mm converter** is used for **conversion** from the **imperial system** (inches) to the **metric system** (millimeters).

To **convert inches to MM** allows for **quick** and **accurate** transitions between these two units of length.

**For example:…**

**1 inch = 25.4 millimeters****5 inches = 127 millimeters****0.5 inches = 12.7 millimeters**

## Inches to Millimeters Converter

**millimeters = inches × 25.4**

Inches Converted To | Millimeters |
---|---|

1.0 Inches To MM | 25.40 |

1.5 Inches To MM | 38.10 |

2.0 Inches To MM | 50.80 |

2.5 Inches To MM | 63.50 |

3.0 Inches To MM | 76.20 |

3.5 Inches To MM | 88.90 |

4.0 Inches To MM | 101.60 |

4.5 Inches To MM | 114.30 |

5.0 Inches To MM | 127.00 |

5.5 Inches To MM | 139.70 |

6.0 Inches To MM | 152.40 |

6.5 Inches To MM | 165.10 |

7.0 Inches To MM | 177.80 |

7.5 Inches To MM | 190.50 |

8.0 Inches To MM | 203.20 |

8.5 Inches To MM | 215.90 |

9.0 Inches To MM | 228.60 |

9.5 Inches To MM | 241.30 |

10.0 Inches To MM | 254.00 |

10.5 Inches To | 266.70 Millimeters |

11.0 Inches To | 279.40 Millimeters |

11.5 Inches To | 292.10 Millimeters |

12.0 Inches To | 304.80 Millimeters |

12.5 Inches To | 317.50 Millimeters |

13.0 Inches To | 330.20 Millimeters |

13.5 Inches To | 342.90 Millimeters |

14.0 Inches To | 355.60 Millimeters |

14.5 Inches To | 368.30 Millimeters |

15.0 Inches To | 381.00 Millimeters |

15.5 Inches To | 393.70 Millimeters |

16.0 Inches To | 406.40 Millimeters |

16.5 Inches To | 419.10 Millimeters |

17.0 Inches To | 431.80 Millimeters |

17.5 Inches To | 444.50 Millimeters |

18.0 Inches To | 457.20 Millimeters |

18.5 Inches To | 469.90 Millimeters |

19.0 Inches To | 482.60 Millimeters |

19.5 Inches To | 495.30 Millimeters |

20.0 Inches To | 508.00 Millimeters |

20.5 Inches Equals To | 520.70 Millimeters |

21.0 Inches Equals To | 533.40 Millimeters |

21.5 Inches Equals To | 546.10 Millimeters |

22.0 Inches Equals To | 558.80 |

22.5 Inches Equals To | 571.50 |

23.0 Inches Equals To | 584.20 |

23.5 Inches Equals To | 596.90 |

24.0 Inches Equals To | 609.60 |

24.5 Inches Equals To | 622.30 |

25.0 Inches Equals To | 635.00 |

25.5 Inches Equals To | 647.70 |

26.0 Inches Equals To | 660.40 |

26.5 Inches Equals To | 673.10 |

27.0 Inches Equals To | 685.80 |

27.5 Inches Equals To | 698.50 |

28.0 Inches Equals To | 711.20 |

28.5 Inches Equals To | 723.90 |

29.0 Inches Equals To | 736.60 |

29.5 Inches Equals To | 749.30 |

30.0 Inches Equals To | 762.00 |

30.5 | 774.70 |

31.0 | 787.40 |

31.5 | 800.10 |

32.0 | 812.80 |

32.5 | 825.50 |

33.0 | 838.20 |

33.5 | 850.90 |

34.0 | 863.60 |

34.5 | 876.30 |

35.0 | 889.00 |

35.5 | 901.70 |

36.0 | 914.40 |

36.5 | 927.10 |

37.0 | 939.80 |

37.5 | 952.50 |

38.0 | 965.20 |

38.5 | 977.90 |

39.0 | 990.60 |

39.5 | 1003.30 |

40.0 | 1016.00 |

40.5 | 1028.70 |

41.0 | 1041.40 |

41.5 | 1054.10 |

42.0 | 1066.80 |

42.5 | 1079.50 |

43.0 | 1092.20 |

43.5 | 1104.90 |

44.0 | 1117.60 |

44.5 | 1130.30 |

45.0 | 1143.00 |

45.5 | 1155.70 |

46.0 | 1168.40 |

46.5 | 1181.10 |

47.0 | 1193.80 |

47.5 | 1206.50 |

48.0 | 1219.20 |

48.5 | 1231.90 |

49.0 | 1244.60 |

49.5 | 1257.30 |

50.0 | 1270.00 |

50.5 | 1282.70 |

51.0 | 1295.40 |

51.5 | 1308.10 |

52.0 | 1320.80 |

52.5 | 1333.50 |

53.0 | 1346.20 |

53.5 | 1358.90 |

54.0 | 1371.60 |

54.5 | 1384.30 |

55.0 | 1397.00 |

55.5 | 1409.70 |

56.0 | 1422.40 |

56.5 | 1435.10 |

57.0 | 1447.80 |

57.5 | 1460.50 |

58.0 | 1473.20 |

58.5 | 1485.90 |

59.0 | 1498.60 |

59.5 | 1511.30 |

60.0 | 1524.00 |

60.5 | 1536.70 |

61.0 | 1549.40 |

61.5 | 1562.10 |

62.0 | 1574.80 |

62.5 | 1587.50 |

63.0 | 1600.20 |

63.5 | 1612.90 |

64.0 | 1625.60 |

64.5 | 1638.30 |

65.0 | 1651.00 |

65.5 | 1663.70 |

66.0 | 1676.40 |

66.5 | 1689.10 |

67.0 | 1701.80 |

67.5 | 1714.50 |

68.0 | 1727.20 |

68.5 | 1739.90 |

69.0 | 1752.60 |

69.5 | 1765.30 |

70.0 | 1778.00 |

70.5 | 1790.70 |

71.0 | 1803.40 |

71.5 | 1816.10 |

72.0 | 1828.80 |

72.5 | 1841.50 |

73.0 | 1854.20 |

73.5 | 1866.90 |

74.0 | 1879.60 |

74.5 | 1892.30 |

75.0 | 1905.00 |

75.5 | 1917.70 |

76.0 | 1930.40 |

76.5 | 1943.10 |

77.0 | 1955.80 |

77.5 | 1968.50 |

78.0 | 1981.20 |

78.5 | 1993.90 |

79.0 | 2006.60 |

79.5 | 2019.30 |

80.0 | 2032.00 |

80.5 | 2044.70 |

81.0 | 2057.40 |

81.5 | 2070.10 |

82.0 | 2082.80 |

82.5 | 2095.50 |

83.0 | 2108.20 |

83.5 | 2120.90 |

84.0 | 2133.60 |

84.5 | 2146.30 |

85.0 | 2159.00 |

85.5 | 2171.70 |

86.0 | 2184.40 |

86.5 | 2197.10 |

87.0 | 2209.80 |

87.5 | 2222.50 |

88.0 | 2235.20 |

88.5 | 2247.90 |

89.0 | 2260.60 |

89.5 | 2273.30 |

90.0 | 2286.00 |

90.5 | 2298.70 |

91.0 | 2311.40 |

91.5 | 2324.10 |

92.0 | 2336.80 |

92.5 | 2349.50 |

93.0 | 2362.20 |

93.5 | 2374.90 |

94.0 | 2387.60 |

94.5 | 2400.30 |

95.0 | 2413.00 |

95.5 | 2425.70 |

96.0 | 2438.40 |

96.5 | 2451.10 |

97.0 | 2463.80 |

97.5 | 2476.50 |

98.0 | 2489.20 |

98.5 | 2501.90 |

99.0 | 2514.60 |

99.5 | 2527.30 |

100.0 | 2540.00 |

Inches To | Conversion Equation | Millimeters |
---|---|---|

2.5 | 2.5 × 25.4 | 63.5 |

0.75 | 0.75 × 25.4 | 19.05 |

3.33 | 3.33 × 25.4 | 84.582 |

5.125 | 5.125 × 25.4 | 130.175 |

0.0625 | 0.0625 × 25.4 | 1.5875 |

10 | 10 × 25.4 | 254 |

0.375 | 0.375 × 25.4 | 9.525 |

7.8 | 7.8 × 25.4 | 198.12 |

1.667 | 1.667 × 25.4 | 42.3418 |

4.25 | 4.25 × 25.4 | 107.95 |

# Inches to mm Formula

The formula to convert **inches **to **millimeters **is **easy**:

**1 inch = 25.4 millimeters**

To convert any given length in inches to millimeters, you **multiply** the number of inches by **25.4**.

Mathematically, this can be expressed as:

**mm = inches × 25.4**

Let’s look at some **examples** to illustrate this formula:

**Convert 3 inches to millimeters:**mm = 3 × 25.4 =**76.2 mm****Convert 7.5 inches to millimeters:**mm = 7.5 × 25.4 =**190.5 mm****Convert 0.25 inches to millimeters:**mm = 0.25 × 25.4 =**6.35 mm**

This formula works for any value of inches, whether it’s a **whole number**, **fraction**, or **decimal**.

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# How many inches in a millimeter

Since **1 inch equals 25.4 millimeters**, we can calculate that:

**1 millimeter = 1 ÷ 25.4 inches = 0.03937 inches**

This means that a millimeter is a **very small fraction** of an inch, specifically about **1/25th** of an inch.

To understand how many **inches are in a millimeter**, we need to **reverse** our thinking from the previous section.

# How many mm is 1/4 inch?

To convert **1/4 inch** to millimeters, we apply our conversion formula:

mm = 0.25 × 25.4 = **6.35 mm**

Therefore, **1/4 inch is equal to 6.35 millimeters**.

# Is 20 mm the same as 1 inch?

No, **20 mm is not the same as 1 inch**. Let’s compare:

1 inch = 25.4 mm

20 mm = 20 ÷ 25.4 = **0.7874 inches**

As we can see, **20 mm is approximately 0.7874 inches**, which is **less than 1 inch**. To be precise, **20 mm is about 78.74% of an inch**.

# How many mm is 1/8 inch?

To find out how many millimeters are in **1/8 inch**, we use our conversion formula:

mm = 0.125 × 25.4 = **3.175 mm**

Thus, **1/8 inch is equal to 3.175 millimeters**.

# How many mm is 1/2 inch?

For **1/2 inch**, we again apply the conversion formula:

mm = 0.5 × 25.4 = **12.7 mm**

Therefore, **1/2 inch is equal to 12.7 millimeters**.

**Inches to Millimeters Conversion Chart**

Inches | Millimeters |
---|---|

1/16 | 1.5875 |

1/8 | 3.175 |

1/4 | 6.35 |

1/2 | 12.7 |

3/4 | 19.05 |

1 | 25.4 |

2 | 50.8 |

3 | 76.2 |

4 | 101.6 |

5 | 127 |

6 | 152.4 |