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Longueur • NIST Exact

Millimètres → Pouces

mm → in

1 mm = 0.0393700787 in• NIST Exact

NIST Exact

Basé sur le National Institute of Standards and Technology (É.-U.)

Confidentialité

Tous les calculs s'exécutent dans votre navigateur

Résultats instantanés

Conversion en temps réel pendant la saisie

Fonctionne hors ligne

Aucune connexion Internet requise

mm → in Tableau de référence

mm in
0.001 mm 0.00003937007874 in
0.002 mm 0.00007874015748 in
0.003 mm 0.0001181102362 in
0.004 mm 0.000157480315 in
0.005 mm 0.0001968503937 in
0.006 mm 0.0002362204724 in
0.007 mm 0.0002755905512 in
0.008 mm 0.0003149606299 in
0.009 mm 0.0003543307087 in
0.01 mm 0.0003937007874 in
0.02 mm 0.0007874015748 in
0.03 mm 0.001181102362 in
0.04 mm 0.00157480315 in
0.05 mm 0.001968503937 in
0.06 mm 0.002362204724 in
0.07 mm 0.002755905512 in
0.08 mm 0.003149606299 in
0.09 mm 0.003543307087 in
0.1 mm 0.003937007874 in
0.2 mm 0.007874015748 in
0.3 mm 0.01181102362 in
0.4 mm 0.0157480315 in
0.5 mm 0.01968503937 in
0.6 mm 0.02362204724 in
0.7 mm 0.02755905512 in
0.8 mm 0.03149606299 in
0.9 mm 0.03543307087 in
1 mm 0.03937007874 in
1.5 mm 0.05905511811 in
2 mm 0.07874015748 in
2.5 mm 0.09842519685 in
3 mm 0.1181102362 in
3.5 mm 0.1377952756 in
4 mm 0.157480315 in
4.5 mm 0.1771653543 in
5 mm 0.1968503937 in
5.5 mm 0.2165354331 in
6 mm 0.2362204724 in
6.5 mm 0.2559055118 in
7 mm 0.2755905512 in
7.5 mm 0.2952755906 in
8 mm 0.3149606299 in
8.5 mm 0.3346456693 in
9 mm 0.3543307087 in
9.5 mm 0.374015748 in
10 mm 0.3937007874 in
11 mm 0.4330708661 in
12 mm 0.4724409449 in
13 mm 0.5118110236 in
14 mm 0.5511811024 in
15 mm 0.5905511811 in
16 mm 0.6299212598 in
17 mm 0.6692913386 in
18 mm 0.7086614173 in
19 mm 0.7480314961 in
20 mm 0.7874015748 in
25 mm 0.9842519685 in
30 mm 1.181102362 in
35 mm 1.377952756 in
40 mm 1.57480315 in
45 mm 1.771653543 in
50 mm 1.968503937 in
55 mm 2.165354331 in
60 mm 2.362204724 in
65 mm 2.559055118 in
70 mm 2.755905512 in
75 mm 2.952755906 in
80 mm 3.149606299 in
85 mm 3.346456693 in
90 mm 3.543307087 in
95 mm 3.74015748 in
100 mm 3.937007874 in
120 mm 4.724409449 in
125 mm 4.921259843 in
130 mm 5.118110236 in
140 mm 5.511811024 in
150 mm 5.905511811 in
160 mm 6.299212598 in
175 mm 6.88976378 in
180 mm 7.086614173 in
200 mm 7.874015748 in
225 mm 8.858267717 in
250 mm 9.842519685 in
275 mm 10.82677165 in
300 mm 11.81102362 in
350 mm 13.77952756 in
400 mm 15.7480315 in
450 mm 17.71653543 in
500 mm 19.68503937 in
600 mm 23.62204724 in
700 mm 27.55905512 in
750 mm 29.52755906 in
800 mm 31.49606299 in
900 mm 35.43307087 in
1000 mm 39.37007874 in
1200 mm 47.24409449 in
1250 mm 49.21259843 in
1500 mm 59.05511811 in
1750 mm 68.8976378 in
2000 mm 78.74015748 in
2500 mm 98.42519685 in
3000 mm 118.1102362 in
4000 mm 157.480315 in
4500 mm 177.1653543 in
5000 mm 196.8503937 in
6000 mm 236.2204724 in
7000 mm 275.5905512 in
7500 mm 295.2755906 in
8000 mm 314.9606299 in
9000 mm 354.3307087 in
10000 mm 393.7007874 in
15000 mm 590.5511811 in
20000 mm 787.4015748 in
25000 mm 984.2519685 in
50000 mm 1968.503937 in
75000 mm 2952.755906 in
100000 mm 3937.007874 in

Valeurs basées sur les facteurs de conversion NIST SP 811

Real-World Examples

iPhone 15 Pro thickness (8.25 mm)

8.3 mm = 0.3267716535 in

Thickness of two stacked coins

3 mm = 0.1181102362 in

Width of a smartphone screen

150 mm = 5.905511811 in

Typical screw diameter (M4.5)

4.5 mm = 0.1771653543 in

Pourquoi convertir Millimètres en Pouces ?

La conversion entre millimètres (mm) et pouces (in) est l'une des conversions de longueur les plus courantes. Que ce soit pour l'ingénierie, la cuisine, les voyages ou la science, savoir convertir rapidement mm en in fait gagner du temps et évite les erreurs.

Length conversions between mm and in are fundamental in construction, manufacturing, and international trade. Architects rely on precise conversions when adapting building plans between metric and imperial standards — a 1% error on a 30-meter wall translates to 30 cm of misalignment. Travelers frequently convert between kilometers and miles for road trips, while online shoppers need length conversions to verify clothing sizes, furniture dimensions, and screen diagonals across international retailers. In athletics, track distances (100m, 1500m, marathon) must be precisely converted for record comparisons across different measurement traditions.

Comment convertir Millimètres en Pouces

Pour convertir millimètres en pouces, utilisez la formule suivante :

in = mm × 0.03937007874

Exemple : 1 mm = 0.03937007874 in

Par exemple, 5 mm = 0.1968503937 in, 10 mm = 0.3937007874 in et 100 mm = 3.937007874 in. Pour des valeurs plus grandes, 1000 mm = 39.37007874 in. Inversement, 1 in = 25.4 mm. Notre calculateur effectue cette conversion instantanément avec une précision totale — sans erreur d'arrondi.

Cas d'utilisation courants

  • iPhone 15 Pro thickness (8.25 mm): 8.3 mm = 0.3267716535 in
  • Thickness of two stacked coins: 3 mm = 0.1181102362 in
  • Width of a smartphone screen: 150 mm = 5.905511811 in
  • Typical screw diameter (M4.5): 4.5 mm = 0.1771653543 in

Erreurs courantes à éviter

  • Confusing similar units: confusing nautical miles with regular miles, or yards with meters.
  • Decimal errors: moving the decimal point the wrong way (e.g., 100 cm = 1 m, not 10 m).
  • Approximation: assuming an inch is exactly 2.5 cm (it's 2.54 cm).

Conseils de pro

  • Use 'approx' for mental math: 1 km is roughly 0.6 miles (or 2/3 for quick estimates).
  • Visualize: A meter is about a guitar length; an inch is a thumb width.
  • Ruler check: Most rulers show cm and inches together—great for quick checks.

Qu'est-ce qu'un Millimètre ?

The millimeter (mm) is a metric unit of length equal to one-thousandth of a meter (0.001 m). It is a standard unit in the International System of Units (SI).

Millimeters are used for precision engineering, manufacturing dimensions, rainfall measurement, and paper sizes (ISO 216). It represents small scale accuracy.

Qu'est-ce qu'un Pouce ?

The inch (in) is a unit of length in the Imperial and US customary systems. Historically defined as the width of a thumb or three barleycorns, it is now exactly defined as 25.4 millimeters (0.0254 meters) since 1959.

Inches are widely used in the US, UK, and Canada for short lengths. Common uses include screen sizes (TVs, monitors), pipe diameters, and paper sizes.

Questions fréquentes

Combien de pouces y a-t-il dans 1 millimètre ?

1 mm équivaut à 0.03937007874 in. Il s'agit d'un facteur de conversion exact défini par le NIST.

Comment convertir millimètres en pouces ?

Multipliez la valeur en mm par le facteur de conversion. Exemple : 10 mm = 0.3937007874 in. Utilisez notre calculateur ci-dessus pour des résultats instantanés.

La conversion de millimètres en pouces est-elle exacte ?

Oui, cette conversion est mathématiquement exacte selon la définition internationale de ces unités (NIST SP 811).

Puis-je convertir millimètres en pouces hors ligne ?

Oui ! OmniConvert fonctionne entièrement dans votre navigateur — aucune connexion Internet n'est nécessaire après le chargement de la page. Vos données ne quittent jamais votre appareil.

Quelle est la différence entre millimètres et pouces ?

Millimètres (mm) et Pouces (in) sont des unités de longueur mais appartiennent à des systèmes de mesure différents. 1 mm = 0.03937007874 in.

Longueur Plus de conversions

m → ft ft → m cm → in in → cm km → mi mi → km in → mm m → yd yd → m ft → in in → ft 里 → km km → 里 尺 → m m → 尺 mi → m m → mi ft → cm cm → ft cm → mm mm → cm km → yd yd → km nmi → km km → nmi yd → ft ft → yd mi → yd yd → mi mi → ft ft → mi m → cm cm → m m → mm mm → m km → m m → km nmi → mi mi → nmi in → yd yd → in µm → mm mm → µm ft → mm mm → ft m → in in → m ly → km km → ly yd → cm cm → yd

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