Centimeters to Millimeters Converter

How to convert centimeters to millimeters

millimeters = centimeters × 10

1 centimeter is one hundredth of a meter (SI prefix centi, 10⁻²). 1 millimeter is one thousandth of a meter (SI prefix milli, 10⁻³).

The factor is exact in both directions: 1 cm = 10 mm and 1 mm = 0.1 cm. Nothing is rounded until you choose how many decimals to show.

Worked example: 2.5 cm

1. Start with the value in centimeters: 2.5 cm.
2. Multiply by 10, because 1 centimeter = 10 millimeters: 2.5 × 10 = 25 mm.

Centimeters to millimeters chart

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Centimeters from 1 to 100 converted to millimeters with the exact factor, shown to five significant digits.

Centimeters to millimeters, part 1 of 4

cm	mm
1	10
2	20
3	30
4	40
5	50
6	60
7	70
8	80
9	90
10	100
11	110
12	120
13	130
14	140
15	150
16	160
17	170
18	180
19	190
20	200
21	210
22	220
23	230
24	240
25	250

Centimeters to millimeters, part 2 of 4

cm	mm
26	260
27	270
28	280
29	290
30	300
31	310
32	320
33	330
34	340
35	350
36	360
37	370
38	380
39	390
40	400
41	410
42	420
43	430
44	440
45	450
46	460
47	470
48	480
49	490
50	500

Centimeters to millimeters, part 3 of 4

cm	mm
51	510
52	520
53	530
54	540
55	550
56	560
57	570
58	580
59	590
60	600
61	610
62	620
63	630
64	640
65	650
66	660
67	670
68	680
69	690
70	700
71	710
72	720
73	730
74	740
75	750

Centimeters to millimeters, part 4 of 4

cm	mm
76	760
77	770
78	780
79	790
80	800
81	810
82	820
83	830
84	840
85	850
86	860
87	870
88	880
89	890
90	900
91	910
92	920
93	930
94	940
95	950
96	960
97	970
98	980
99	990
100	1,000

millimeters = centimeters × 10. Factors: BIPM SI Brochure. unitcheck.net/length/centimeters-to-millimeters/

Going the other way? Use the Millimeters to Centimeters converter.