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Length • Exact factor

Centimeters → Inches

cm → in

Enter any value for instant conversion. Click on the result to copy with unit.

Reverse Conversion

What it is

Centimeter (cm) and inch (in) are length units. The international inch equals exactly 2.54 cm, so 1 cm ≈ 0.3937007874 in. The converter above uses this factor.

How to use

inches = cm ÷ 2.54 (or × 0.3937007874). Example: 10 cm ≈ 3.937 in; 170 cm ≈ 66.93 in. Reverse: cm = inches × 2.54.

in = cm × 0.3937007874

Example: 1 cm = 0.3937007874 in

Common uses

Height, waist, inseam, screen diagonal, furniture, sewing patterns. Convert inch-labeled sizes to cm before ordering or cutting.

Conversion tips

Do not use the rough 1 in ≈ 2.5 cm for engineering. A 1–100 cm table is below. Conversion runs in your browser; numbers are not uploaded. Matches NIST (1 in = 2.54 cm exactly).

cm → in Reference Table

cm in
1 cm 0.3937007874 in
2 cm 0.7874015748 in
3 cm 1.181102362 in
4 cm 1.57480315 in
5 cm 1.968503937 in
6 cm 2.362204724 in
7 cm 2.755905512 in
8 cm 3.149606299 in
9 cm 3.543307087 in
10 cm 3.937007874 in
11 cm 4.330708661 in
12 cm 4.724409449 in
13 cm 5.118110236 in
14 cm 5.511811024 in
15 cm 5.905511811 in
16 cm 6.299212598 in
17 cm 6.692913386 in
18 cm 7.086614173 in
19 cm 7.480314961 in
20 cm 7.874015748 in
21 cm 8.267716535 in
22 cm 8.661417323 in
23 cm 9.05511811 in
24 cm 9.448818898 in
25 cm 9.842519685 in
26 cm 10.23622047 in
27 cm 10.62992126 in
28 cm 11.02362205 in
29 cm 11.41732283 in
30 cm 11.81102362 in
31 cm 12.20472441 in
32 cm 12.5984252 in
33 cm 12.99212598 in
34 cm 13.38582677 in
35 cm 13.77952756 in
36 cm 14.17322835 in
37 cm 14.56692913 in
38 cm 14.96062992 in
39 cm 15.35433071 in
40 cm 15.7480315 in
41 cm 16.14173228 in
42 cm 16.53543307 in
43 cm 16.92913386 in
44 cm 17.32283465 in
45 cm 17.71653543 in
46 cm 18.11023622 in
47 cm 18.50393701 in
48 cm 18.8976378 in
49 cm 19.29133858 in
50 cm 19.68503937 in
51 cm 20.07874016 in
52 cm 20.47244094 in
53 cm 20.86614173 in
54 cm 21.25984252 in
55 cm 21.65354331 in
56 cm 22.04724409 in
57 cm 22.44094488 in
58 cm 22.83464567 in
59 cm 23.22834646 in
60 cm 23.62204724 in
61 cm 24.01574803 in
62 cm 24.40944882 in
63 cm 24.80314961 in
64 cm 25.19685039 in
65 cm 25.59055118 in
66 cm 25.98425197 in
67 cm 26.37795276 in
68 cm 26.77165354 in
69 cm 27.16535433 in
70 cm 27.55905512 in
71 cm 27.95275591 in
72 cm 28.34645669 in
73 cm 28.74015748 in
74 cm 29.13385827 in
75 cm 29.52755906 in
76 cm 29.92125984 in
77 cm 30.31496063 in
78 cm 30.70866142 in
79 cm 31.1023622 in
80 cm 31.49606299 in
81 cm 31.88976378 in
82 cm 32.28346457 in
83 cm 32.67716535 in
84 cm 33.07086614 in
85 cm 33.46456693 in
86 cm 33.85826772 in
87 cm 34.2519685 in
88 cm 34.64566929 in
89 cm 35.03937008 in
90 cm 35.43307087 in
91 cm 35.82677165 in
92 cm 36.22047244 in
93 cm 36.61417323 in
94 cm 37.00787402 in
95 cm 37.4015748 in
96 cm 37.79527559 in
97 cm 38.18897638 in
98 cm 38.58267717 in
99 cm 38.97637795 in
100 cm 39.37007874 in

Calculated from factors marked exact in the unit registry.

Real-World Examples

Carry-on luggage max height (55 cm)

55 cm = 21.65354331 in

Carry-on luggage max width (40 cm)

40 cm = 15.7480315 in

Carry-on luggage max depth (20 cm)

20 cm = 7.874015748 in

Average adult height (170 cm)

170 cm = 66.92913386 in

Standard dining table height

80 cm = 31.49606299 in

Frequently Asked Questions

Length More Conversions

m → ftft → min → cmkm → mimi → kmmm → inin → mmm → ydyd → mft → inin → ft里 → kmkm → 里尺 → mm → 尺mi → mm → mift → cmcm → ftcm → mmmm → cmkm → ydyd → kmnmi → kmkm → nmiyd → ftft → ydmi → ydyd → mimi → ftft → mim → cmcm → mm → mmmm → mkm → mm → kmnmi → mimi → nmiin → ydyd → inµm → mmmm → µmft → mmmm → ftm → inin → mly → kmkm → lyyd → cmcm → yd尺 → cmcm → 尺寸 → cmcm → 寸尺 → cmcm → 尺寸 → cmcm → 寸ligne → mmmm → ligneligne → cmcm → ligneligne → inin → ligne寸 → inin → 寸尺 → inin → 尺寸 → inin → 寸尺 → inin → 尺丈 → m里 → min → µmµm → mnm → µmmi → 里dm → cmpm → cmkm → pmlight-s → mkm → mmly → cmcm → nmin → lyµm → incm → kmcm → lycm → µmcm → mift → lyft → nmiin → mikm → cmly → inly → ydm → nmµm → lynm → lynm → minm → mmyd → lyyd → mmyd → pmµm → pmpm → kmpm → mmcm → dmdm → kmdm → mdm → mmdm → ydin → pmkm → dmlight-s → dmm → dmm → pmmi → dmmi → pmmm → dmmm → pmpm → inpm → lypm → nmau → cmcm → auftm → mmftm → nmft → ftmau → µmftm → inftm → kmftm → 里ftm → mftm → mily → ftmmi → auyd → ftmpc → cm

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