Tableau de conversion des pouces en mm

Tableau de conversion des pouces en mm : fractions jusqu’à 2 pouces par pas de 1/64 avec valeurs en millimètres et pouces décimaux, et pouces de 1 à 100 mm.

Pour une consultation préliminaire. Vérifiez les conditions d’utilisation et confirmez les valeurs dans la norme applicable.

Lignes visibles : 228

Équivalences entre pouces et millimètres
valeur	millimètresmm	pouce décimalin
1/64 in	0,396875	0,0156250
1/32 in	0,793750	0,0312500
3/64 in	1,190625	0,0468750
1/16 in	1,587500	0,0625000
5/64 in	1,984375	0,0781250
3/32 in	2,381250	0,0937500
7/64 in	2,778125	0,1093750
1/8 in	3,175000	0,1250000
9/64 in	3,571875	0,1406250
5/32 in	3,968750	0,1562500
11/64 in	4,365625	0,1718750
3/16 in	4,762500	0,1875000
13/64 in	5,159375	0,2031250
7/32 in	5,556250	0,2187500
15/64 in	5,953125	0,2343750
1/4 in	6,350000	0,2500000
17/64 in	6,746875	0,2656250
9/32 in	7,143750	0,2812500
19/64 in	7,540625	0,2968750
5/16 in	7,937500	0,3125000
21/64 in	8,334375	0,3281250
11/32 in	8,731250	0,3437500
23/64 in	9,128125	0,3593750
3/8 in	9,525000	0,3750000
25/64 in	9,921875	0,3906250
13/32 in	10,318750	0,4062500
27/64 in	10,715625	0,4218750
7/16 in	11,112500	0,4375000
29/64 in	11,509375	0,4531250
15/32 in	11,906250	0,4687500
31/64 in	12,303125	0,4843750
1/2 in	12,700000	0,5000000
33/64 in	13,096875	0,5156250
17/32 in	13,493750	0,5312500
35/64 in	13,890625	0,5468750
9/16 in	14,287500	0,5625000
37/64 in	14,684375	0,5781250
19/32 in	15,081250	0,5937500
39/64 in	15,478125	0,6093750
5/8 in	15,875000	0,6250000
41/64 in	16,271875	0,6406250
21/32 in	16,668750	0,6562500
43/64 in	17,065625	0,6718750
11/16 in	17,462500	0,6875000
45/64 in	17,859375	0,7031250
23/32 in	18,256250	0,7187500
47/64 in	18,653125	0,7343750
3/4 in	19,050000	0,7500000
49/64 in	19,446875	0,7656250
25/32 in	19,843750	0,7812500
51/64 in	20,240625	0,7968750
13/16 in	20,637500	0,8125000
53/64 in	21,034375	0,8281250
27/32 in	21,431250	0,8437500
55/64 in	21,828125	0,8593750
7/8 in	22,225000	0,8750000
57/64 in	22,621875	0,8906250
29/32 in	23,018750	0,9062500
59/64 in	23,415625	0,9218750
15/16 in	23,812500	0,9375000
61/64 in	24,209375	0,9531250
31/32 in	24,606250	0,9687500
63/64 in	25,003125	0,9843750
1 in	25,400000	1,0000000
65/64 in	25,796875	1,0156250
33/32 in	26,193750	1,0312500
67/64 in	26,590625	1,0468750
17/16 in	26,987500	1,0625000
69/64 in	27,384375	1,0781250
35/32 in	27,781250	1,0937500
71/64 in	28,178125	1,1093750
9/8 in	28,575000	1,1250000
73/64 in	28,971875	1,1406250
37/32 in	29,368750	1,1562500
75/64 in	29,765625	1,1718750
19/16 in	30,162500	1,1875000
77/64 in	30,559375	1,2031250
39/32 in	30,956250	1,2187500
79/64 in	31,353125	1,2343750
5/4 in	31,750000	1,2500000
81/64 in	32,146875	1,2656250
41/32 in	32,543750	1,2812500
83/64 in	32,940625	1,2968750
21/16 in	33,337500	1,3125000
85/64 in	33,734375	1,3281250
43/32 in	34,131250	1,3437500
87/64 in	34,528125	1,3593750
11/8 in	34,925000	1,3750000
89/64 in	35,321875	1,3906250
45/32 in	35,718750	1,4062500
91/64 in	36,115625	1,4218750
23/16 in	36,512500	1,4375000
93/64 in	36,909375	1,4531250
47/32 in	37,306250	1,4687500
95/64 in	37,703125	1,4843750
3/2 in	38,100000	1,5000000
97/64 in	38,496875	1,5156250
49/32 in	38,893750	1,5312500
99/64 in	39,290625	1,5468750
25/16 in	39,687500	1,5625000
101/64 in	40,084375	1,5781250
51/32 in	40,481250	1,5937500
103/64 in	40,878125	1,6093750
13/8 in	41,275000	1,6250000
105/64 in	41,671875	1,6406250
53/32 in	42,068750	1,6562500
107/64 in	42,465625	1,6718750
27/16 in	42,862500	1,6875000
109/64 in	43,259375	1,7031250
55/32 in	43,656250	1,7187500
111/64 in	44,053125	1,7343750
7/4 in	44,450000	1,7500000
113/64 in	44,846875	1,7656250
57/32 in	45,243750	1,7812500
115/64 in	45,640625	1,7968750
29/16 in	46,037500	1,8125000
117/64 in	46,434375	1,8281250
59/32 in	46,831250	1,8437500
119/64 in	47,228125	1,8593750
15/8 in	47,625000	1,8750000
121/64 in	48,021875	1,8906250
61/32 in	48,418750	1,9062500
123/64 in	48,815625	1,9218750
31/16 in	49,212500	1,9375000
125/64 in	49,609375	1,9531250
63/32 in	50,006250	1,9687500
127/64 in	50,403125	1,9843750
2 in	50,800000	2,0000000
1 mm	1,000000	0,0393701
2 mm	2,000000	0,0787402
3 mm	3,000000	0,1181102
4 mm	4,000000	0,1574803
5 mm	5,000000	0,1968504
6 mm	6,000000	0,2362205
7 mm	7,000000	0,2755906
8 mm	8,000000	0,3149606
9 mm	9,000000	0,3543307
10 mm	10,000000	0,3937008
11 mm	11,000000	0,4330709
12 mm	12,000000	0,4724409
13 mm	13,000000	0,5118110
14 mm	14,000000	0,5511811
15 mm	15,000000	0,5905512
16 mm	16,000000	0,6299213
17 mm	17,000000	0,6692913
18 mm	18,000000	0,7086614
19 mm	19,000000	0,7480315
20 mm	20,000000	0,7874016
21 mm	21,000000	0,8267717
22 mm	22,000000	0,8661417
23 mm	23,000000	0,9055118
24 mm	24,000000	0,9448819
25 mm	25,000000	0,9842520
26 mm	26,000000	1,0236220
27 mm	27,000000	1,0629921
28 mm	28,000000	1,1023622
29 mm	29,000000	1,1417323
30 mm	30,000000	1,1811024
31 mm	31,000000	1,2204724
32 mm	32,000000	1,2598425
33 mm	33,000000	1,2992126
34 mm	34,000000	1,3385827
35 mm	35,000000	1,3779528
36 mm	36,000000	1,4173228
37 mm	37,000000	1,4566929
38 mm	38,000000	1,4960630
39 mm	39,000000	1,5354331
40 mm	40,000000	1,5748031
41 mm	41,000000	1,6141732
42 mm	42,000000	1,6535433
43 mm	43,000000	1,6929134
44 mm	44,000000	1,7322835
45 mm	45,000000	1,7716535
46 mm	46,000000	1,8110236
47 mm	47,000000	1,8503937
48 mm	48,000000	1,8897638
49 mm	49,000000	1,9291339
50 mm	50,000000	1,9685039
51 mm	51,000000	2,0078740
52 mm	52,000000	2,0472441
53 mm	53,000000	2,0866142
54 mm	54,000000	2,1259843
55 mm	55,000000	2,1653543
56 mm	56,000000	2,2047244
57 mm	57,000000	2,2440945
58 mm	58,000000	2,2834646
59 mm	59,000000	2,3228346
60 mm	60,000000	2,3622047
61 mm	61,000000	2,4015748
62 mm	62,000000	2,4409449
63 mm	63,000000	2,4803150
64 mm	64,000000	2,5196850
65 mm	65,000000	2,5590551
66 mm	66,000000	2,5984252
67 mm	67,000000	2,6377953
68 mm	68,000000	2,6771654
69 mm	69,000000	2,7165354
70 mm	70,000000	2,7559055
71 mm	71,000000	2,7952756
72 mm	72,000000	2,8346457
73 mm	73,000000	2,8740157
74 mm	74,000000	2,9133858
75 mm	75,000000	2,9527559
76 mm	76,000000	2,9921260
77 mm	77,000000	3,0314961
78 mm	78,000000	3,0708661
79 mm	79,000000	3,1102362
80 mm	80,000000	3,1496063
81 mm	81,000000	3,1889764
82 mm	82,000000	3,2283465
83 mm	83,000000	3,2677165
84 mm	84,000000	3,3070866
85 mm	85,000000	3,3464567
86 mm	86,000000	3,3858268
87 mm	87,000000	3,4251969
88 mm	88,000000	3,4645669
89 mm	89,000000	3,5039370
90 mm	90,000000	3,5433071
91 mm	91,000000	3,5826772
92 mm	92,000000	3,6220472
93 mm	93,000000	3,6614173
94 mm	94,000000	3,7007874
95 mm	95,000000	3,7401575
96 mm	96,000000	3,7795276
97 mm	97,000000	3,8188976
98 mm	98,000000	3,8582677
99 mm	99,000000	3,8976378
100 mm	100,000000	3,9370079

Réponses rapides

1/4 in = 6,35 mm = 0,25 in. Voir dans le tableau
1/2 in = 12,7 mm = 0,5 in. Voir dans le tableau
3/4 in = 19,05 mm = 0,75 in. Voir dans le tableau
1 in = 25,4 mm = 1 in. Voir dans le tableau
10 mm = 10 mm = 0,3937008 in. Voir dans le tableau
25 mm = 25 mm = 0,984252 in. Voir dans le tableau

Conditions et notes

Pouce international. Il ne s’agit pas de dimensions nominales de tubes.

Le pouce international vaut exactement 25,4 mm. Multipliez les pouces par 25,4 pour obtenir des millimètres et divisez pour la conversion inverse. Par exemple, 1/64 de pouce vaut exactement 0,396875 mm. Les fractions progressent par pas de 1/64 jusqu’à 2 pouces. La dernière partie donne les conversions inverses de 1 à 100 mm par pas de 1 mm. Ce sont des longueurs, pas des dimensions nominales de tubes ou de filetages.

Sources

Ce tableau est une référence préliminaire. Vérifiez la norme applicable et les conditions du produit avant utilisation.

Source 1. SP 811:2008. Consultation: 2026-10-16

Version des données: 2026-10-16

Calculateurs associés

Convertisseur d’unités : toutes les unités dans un tableau copiable

Réponses rapides

Conditions et notes

Sources

Calculateurs associés

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