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 ToMillimeters
1.0 Inches To MM25.40
1.5 Inches To MM38.10
2.0 Inches To MM50.80
2.5 Inches To MM63.50
3.0 Inches To MM76.20
3.5 Inches To MM88.90
4.0 Inches To MM101.60
4.5 Inches To MM114.30
5.0 Inches To MM127.00
5.5 Inches To MM139.70
6.0 Inches To MM152.40
6.5 Inches To MM165.10
7.0 Inches To MM177.80
7.5 Inches To MM190.50
8.0 Inches To MM203.20
8.5 Inches To MM215.90
9.0 Inches To MM228.60
9.5 Inches To MM241.30
10.0 Inches To MM254.00
10.5 Inches To266.70 Millimeters
11.0 Inches To279.40 Millimeters
11.5 Inches To292.10 Millimeters
12.0 Inches To304.80 Millimeters
12.5 Inches To317.50 Millimeters
13.0 Inches To330.20 Millimeters
13.5 Inches To342.90 Millimeters
14.0 Inches To355.60 Millimeters
14.5 Inches To368.30 Millimeters
15.0 Inches To381.00 Millimeters
15.5 Inches To393.70 Millimeters
16.0 Inches To406.40 Millimeters
16.5 Inches To419.10 Millimeters
17.0 Inches To431.80 Millimeters
17.5 Inches To444.50 Millimeters
18.0 Inches To457.20 Millimeters
18.5 Inches To469.90 Millimeters
19.0 Inches To482.60 Millimeters
19.5 Inches To495.30 Millimeters
20.0 Inches To508.00 Millimeters
20.5 Inches Equals To520.70 Millimeters
21.0 Inches Equals To533.40 Millimeters
21.5 Inches Equals To546.10 Millimeters
22.0 Inches Equals To558.80
22.5 Inches Equals To571.50
23.0 Inches Equals To584.20
23.5 Inches Equals To596.90
24.0 Inches Equals To609.60
24.5 Inches Equals To622.30
25.0 Inches Equals To635.00
25.5 Inches Equals To647.70
26.0 Inches Equals To660.40
26.5 Inches Equals To673.10
27.0 Inches Equals To685.80
27.5 Inches Equals To698.50
28.0 Inches Equals To711.20
28.5 Inches Equals To723.90
29.0 Inches Equals To736.60
29.5 Inches Equals To749.30
30.0 Inches Equals To762.00
30.5774.70
31.0787.40
31.5800.10
32.0812.80
32.5825.50
33.0838.20
33.5850.90
34.0863.60
34.5876.30
35.0889.00
35.5901.70
36.0914.40
36.5927.10
37.0939.80
37.5952.50
38.0965.20
38.5977.90
39.0990.60
39.51003.30
40.01016.00
40.51028.70
41.01041.40
41.51054.10
42.01066.80
42.51079.50
43.01092.20
43.51104.90
44.01117.60
44.51130.30
45.01143.00
45.51155.70
46.01168.40
46.51181.10
47.01193.80
47.51206.50
48.01219.20
48.51231.90
49.01244.60
49.51257.30
50.01270.00
50.51282.70
51.01295.40
51.51308.10
52.01320.80
52.51333.50
53.01346.20
53.51358.90
54.01371.60
54.51384.30
55.01397.00
55.51409.70
56.01422.40
56.51435.10
57.01447.80
57.51460.50
58.01473.20
58.51485.90
59.01498.60
59.51511.30
60.01524.00
60.51536.70
61.01549.40
61.51562.10
62.01574.80
62.51587.50
63.01600.20
63.51612.90
64.01625.60
64.51638.30
65.01651.00
65.51663.70
66.01676.40
66.51689.10
67.01701.80
67.51714.50
68.01727.20
68.51739.90
69.01752.60
69.51765.30
70.01778.00
70.51790.70
71.01803.40
71.51816.10
72.01828.80
72.51841.50
73.01854.20
73.51866.90
74.01879.60
74.51892.30
75.01905.00
75.51917.70
76.01930.40
76.51943.10
77.01955.80
77.51968.50
78.01981.20
78.51993.90
79.02006.60
79.52019.30
80.02032.00
80.52044.70
81.02057.40
81.52070.10
82.02082.80
82.52095.50
83.02108.20
83.52120.90
84.02133.60
84.52146.30
85.02159.00
85.52171.70
86.02184.40
86.52197.10
87.02209.80
87.52222.50
88.02235.20
88.52247.90
89.02260.60
89.52273.30
90.02286.00
90.52298.70
91.02311.40
91.52324.10
92.02336.80
92.52349.50
93.02362.20
93.52374.90
94.02387.60
94.52400.30
95.02413.00
95.52425.70
96.02438.40
96.52451.10
97.02463.80
97.52476.50
98.02489.20
98.52501.90
99.02514.60
99.52527.30
100.02540.00

Inches ToConversion EquationMillimeters
2.52.5 × 25.463.5
0.750.75 × 25.419.05
3.333.33 × 25.484.582
5.1255.125 × 25.4130.175
0.06250.0625 × 25.41.5875
1010 × 25.4254
0.3750.375 × 25.49.525
7.87.8 × 25.4198.12
1.6671.667 × 25.442.3418
4.254.25 × 25.4107.95

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:

  1. Convert 3 inches to millimeters: mm = 3 × 25.4 = 76.2 mm
  2. Convert 7.5 inches to millimeters: mm = 7.5 × 25.4 = 190.5 mm
  3. 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.

Related Tools:

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

InchesMillimeters
1/161.5875
1/83.175
1/46.35
1/212.7
3/419.05
125.4
250.8
376.2
4101.6
5127
6152.4

Thanks for visiting and reading! My name is Garth, and I would like to welcome you to my personal birding space.

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