Conversion Chart

Imperial to the metric conversion chart

Do you know the origin of inch units? To make a long story short, it comes from Old English once, equivalent to a twelfth of a foot as a Roman. In the 12th century, King David of Scotland defined it as the average of the thumb’s width at the base of the nail of three people of different heights. The average size of three persons will make the measurement more consistent. The actual definition of size evolved, and it was not until 1959 that it was officially defined as 2.54 cm due to the consensus of all countries that use imperial units.
If you search online, you will find some websites and mobile apps that can help you convert from metric to imperial and vice versa. However, when you select the inch size bearing parts, you can check the inch metric conversion table below to find it.

Inches	mm
1/32	0.79
3/64	1.19
2021-01-16 00:00:00	1.59
5/64	1.98
3/32	2.38
7/64	2.78
2021-01-08 00:00:00	3.18
9/64	3.57
5/32	3.97
11/64	4.37
2021-03-16 00:00:00	4.76
13/64	5.16
7/32	5.56
15/64	5.95
2021-01-04 00:00:00	6.35
17/64	6.75
9/32	7.14
19/64	7.54
2021-05-16 00:00:00	7.94
21/64	8.33
11/32	8.73
23/64	9.13
2021-03-08 00:00:00	9.53
25/64	9.92
13/32	10.32
27/64	10.72
2021-07-16 00:00:00	11.11
29/64	11.51
15/32	11.91
31/64	12.3
2021-01-02 00:00:00	12.7
33/64	13.1
17/32	13.49
35/64	13.89
2021-09-16 00:00:00	14.29
37/64	14.68
19/32	15.08
39/64	15.48
2021-05-08 00:00:00	15.88
41/64	16.27
21/32	16.67
43/64	17.07
2021-11-16 00:00:00	17.46
45/64	17.86
23/32	18.26
47/64	18.65
2021-03-04 00:00:00	19.05
49/64	19.45
25/32	19.84
51/64	20.24
13/16	20.64
53/64	21.03
27/32	21.43
55/64	21.83
2021-07-08 00:00:00	22.23
57/64	22.62
29/32	23.02
59/64	23.42
15/16	23.81
61/64	24.21
31/32	24.61
63/64	25
1	25.4
1 1/32	26.19
1 1/16	26.99
1 3/32	27.78
1 1/8	28.58
1 5/32	29.37
1 3/16	30.16
1 7/32	30.96
1 1/4	31.75
1 9/32	32.54
1 5/16	33.34
1 11/32	34.13
1 3/8	34.93
1 13/32	35.72
1 7/16	36.51
1 15/32	37.31
1 1/2	38.1
1 17/32	38.89
1 9/16	39.69
1 19/32	40.48
1 5/8	41.28
1 21/32	42.07
1 11/16	42.86
1 23/32	43.66
1 3/4	44.45
1 25/32	45.24
1 13/16	46.04
1 27/32	46.83
1 7/8	47.63
1 29/32	48.42
1 15/16	49.21
1 31/32	50.01
2	50.8
2 1/32	51.59
2 1/16	52.39
2 3/32	53.18
2 1/8	53.98
2 5/32	54.77
2 3/16	55.56
2 7/32	56.36
2 1/4	57.15
2 9/32	57.94
2 5/16	58.74
2 11/32	59.53
2 3/8	60.33
2 13/32	61.12
2 7/16	61.91
2 15/32	62.71
2 1/2	63.5
2 17/32	64.29
2 9/16	65.09
2 19/32	65.88
2 5/8	66.68
2 21/32	67.47
2 11/16	68.26
2 23/32	69.06
2 3/4	69.85
2 25/32	70.64
2 13/16	71.44
2 27/32	72.23
2 7/8	73.03
2 29/32	73.82
2 15/16	74.61
2 31/32	75.41
3	76.2
3 1/32	76.99
3 1/16	77.79
3 3/32	78.58
3 1/8	79.38
3 5/32	80.17
3 3/16	80.96
3 7/32	81.76
3 1/4	82.55
3 9/32	83.34
3 5/16	84.14
3 11/32	84.93
3 3/8	85.73
3 13/32	86.52
3 7/16	87.31
3 15/32	88.11
3 1/2	88.9
3 17/32	89.69
3 9/16	90.49
3 19/32	91.28
3 5/8	92.08
3 21/32	92.87
3 11/16	93.66
3 23/32	94.46
3 3/4	95.25
3 25/32	96.04
3 13/16	96.84
3 27/32	97.63
3 7/8	98.43
3 29/32	99.22
3 15/16	100.01
3 31/32	100.81
4	101.6
4 1/32	102.39
4 1/16	103.19
4 3/32	103.98
4 1/8	104.78
4 5/32	105.57
4 3/16	106.36
4 7/32	107.16
4 1/4	107.95
4 9/32	108.74
4 5/16	109.54
4 11/32	110.33
4 3/8	111.13
4 13/32	111.92
4 7/16	112.71
4 15/32	113.51
4 1/2	114.3
4 17/32	115.09
4 9/16	115.89
4 19/32	116.68
4 5/8	117.48
4 21/32	118.27
4 11/16	119.06
4 23/32	119.86
4 3/4	120.65
4 25/32	121.44
4 13/16	122.24
4 27/32	123.03
4 7/8	123.83
4 29/32	124.62
4 15/16	125.41
4 31/32	126.21
5	127
5 1/32	127.79
5 1/16	128.59
5 3/32	129.38
5 1/8	130.18
5 5/32	130.97
5 3/16	131.76
5 7/32	132.56
5 1/4	133.35
5 9/32	134.14
5 5/16	134.94
5 11/32	135.73
5 3/8	136.53
5 13/32	137.32
5 7/16	138.11
5 15/32	138.91
5 1/2	139.7
5 17/32	140.49
5 9/16	141.29
5 19/32	142.08
5 5/8	142.88
5 21/32	143.67
5 11/16	144.46
5 23/32	145.26
5 3/4	146.05
5 25/32	146.84
5 13/16	147.64
5 27/32	148.43
5 7/8	149.23
5 29/32	150.02
5 15/16	150.81
5 31/32	151.61
6	152.4
6 1/32	153.19
6 1/16	153.99
6 3/32	154.78
6 1/8	155.58
6 5/32	156.37
6 3/16	157.16
6 7/32	157.96
6 1/4	158.75
6 9/32	159.54
6 5/16	160.34
6 11/32	161.13
6 3/8	161.93
6 13/32	162.72
6 7/16	163.51
6 15/32	164.31
6 1/2	165.1
6 17/32	165.89
6 9/16	166.69
6 19/32	167.48
6 5/8	168.28
6 21/32	169.07
6 11/16	169.86
6 23/32	170.66
6 3/4	171.45
6 25/32	172.24
6 13/16	173.04
6 27/32	173.83
6 7/8	174.63
6 29/32	175.42
6 15/16	176.21
6 31/32	177.01
7	177.8
7 1/32	178.59
7 1/16	179.39
7 3/32	180.18
7 1/8	180.98
7 5/32	181.77
7 3/16	182.56
7 7/32	183.36
7 1/4	184.15
7 9/32	184.94
7 5/16	185.74
7 11/32	186.53
7 3/8	187.33
7 13/32	188.12
7 7/16	188.91
7 15/32	189.71
7 1/2	190.5
7 17/32	191.29
7 9/16	192.09
7 19/32	192.88
7 5/8	193.68
7 21/32	194.47
7 11/16	195.26
7 23/32	196.06
7 3/4	196.85
7 25/32	197.64
7 13/16	198.44
7 27/32	199.23
7 7/8	200.03
7 29/32	200.82
7 15/16	201.61
7 31/32	202.41

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All indications were made carefully and verified. TFL-BEARINGS doesn´t assume any liability for incomplete or false indications.

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