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长度 • 精确系数

厘米 → 英寸

cm → in

输入任意数值进行即时转换。点击结果可复制带单位的转换结果。

反向转换

是什么

厘米（cm）和英寸（in）都是长度单位。国际英寸精确等于 2.54 厘米，因此 1 厘米 ≈ 0.3937007874 英寸。上方输入框按此系数换算。

如何用

英寸 = 厘米 ÷ 2.54（也可 × 0.3937007874）。例：10 cm ≈ 3.937 in；170 cm ≈ 66.93 in。反向：厘米 = 英寸 × 2.54。

in = cm × 0.3937007874

示例：1 cm = 0.3937007874 in

常见用途

身高、腰围、裤长、屏幕对角线、家具尺寸、服装纸样。海外尺码或英寸标注时，先换成厘米再下单或剪裁。

换算技巧

工程与对照不要用「1 英寸≈2.5 厘米」这种近似。下方有 1–100 厘米对照表。换算在浏览器本地完成，数字不上传。英寸定义与 NIST 常用换算一致（1 in = 2.54 cm 精确）。

cm → in 换算参考表

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

依据单位注册表中标记为精确值的换算系数计算。

生活场景对照

登机箱最大高度限制（55cm）

55 cm = 21.65354331 in

登机箱最大宽度限制（40cm）

40 cm = 15.7480315 in

登机箱最大厚度限制（20cm）

20 cm = 7.874015748 in

成人平均身高（170cm）

170 cm = 66.92913386 in

标准餐桌高度（80cm）

80 cm = 31.49606299 in

常见问题

长度 更多换算

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mm → 寸µm → nm丈 → mmm → 尺nm → cm寸 → in里 → mm → 寸in → µmµm → mnm → mnm → µmdm → cmpm → cmly → cmµm → cmmi → 寸cm → nmin → lyµm → incm → km尺 → 尺ly → mmin → mim → nmµm → lynm → lynm → miyd → lymi → mi尺 → 寸km → inkm → µm里 → nmi里 → 丈mi → cmnm → kmyd → 尺寸 → mµm → pmpm → mmdm → micm → dmdm → mdm → mmpm → lydm → ftdm → indm → pmlight-s → nmnm → pmft → ftmin → auftm → lyftm → pmin → ftmmm → aumm → ftmpm → ftmlight-s → km

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