Centimeter to Inches Converter (CM to In)

How to Convert a Centimeter to Inches

Converting between these units comes down to a single, fixed rule: there are exactly 2.54 centimeters in one inch. Because this relationship never changes, every cm to inch conversion uses the same step.

The CM to Inches Formula

To find your measurement in inches, simply divide your number of centimeters by 2.54:

Inches = Centimeters ÷ 2.54

Whether you are converting a tiny 5 cm object or a 500 cm piece of lumber, the calculation stays the same.

Worked Example: Convert 30 cm to Inches

Suppose you want to convert 30 cm to inches. Just plug the value into the formula:

30 ÷ 2.54 = 11.81 inches

So, 30 centimeters equals approximately 11.81 inches. The same method works for any measurement swap in your own number and divide by 2.54.

Quick Estimation Trick (No Calculator Needed)

No calculator handy? Because one centimeter is roughly equal to 0.4 inches, you can easily estimate the conversion in your head.

Simply multiply your centimeter value by 0.4.

• For 30 cm, that’s 30 × 0.4 = 12 inches.

This is incredibly close to the exact answer of 11.81. While it isn’t perfect for precise engineering, it is a fantastic trick for everyday guessing when you are at the hardware store or visualizing a product size.

Visualizing the Math: Everyday Objects for Scale

Numbers can be abstract, so here is how these measurements translate to the real world:

• 1 inch (2.54 cm): About the length of a standard paperclip.
• 8 inches (~20.3 cm): Roughly the short-side width of a standard piece of A4 printer paper.
• 12 inches (~30.5 cm): The length of a standard classroom ruler.

What Is a Centimeter?

A centimeter (symbol: cm) is a unit of length in the metric system. One centimeter equals one-hundredth of a meter, meaning 100 cm make up 1 meter. It is the everyday measuring unit across most of the world, ideal for measuring the length of a pencil, the size of a phone screen, or a person’s height. For a quick visual, a single centimeter is about the width of an average adult’s fingernail.

What Is an Inch?

An inch (symbol: in, or the double-prime ″) is a unit of length in the imperial and US customary systems. It is primarily used in the United States, the United Kingdom, and Canada. Twelve inches make up one foot. You will commonly see inches used for TV and monitor sizes, human height, and everyday tools, which is exactly why having a reliable cm-to-inches tool is so necessary.

Centimeters vs Inches: The Key Difference

The main difference lies in the measurement system. The centimeter is metric and used globally, while the inch is imperial and used mainly in a handful of English-speaking countries.

The inch is also significantly larger. Because one inch equals 2.54 centimeters, a single inch is more than two and a half times the length of a centimeter. This is why any measurement will always show a smaller number in inches than in centimeters, and why you must divide (rather than multiply) when converting from metric to imperial.

CM to Inches Conversion Tables (1 to 250 cm)

The tables below use the standard conversion factor rounded to two decimal places. For any exact value not listed here, simply divide your centimeters by 2.54.

Small Items & Daily Life Uses (1 cm to 50 cm)

Perfect for visualizing the scale of everyday objects, small tools, crafting materials, and desk items.

Centimeters (cm)	Inches (in)
1 cm	0.39 in
2 cm	0.79 in
3 cm	1.18 in
4 cm	1.57 in
5 cm	1.97 in
6 cm	2.36 in
7 cm	2.76 in
8 cm	3.15 in
9 cm	3.54 in
10 cm	3.94 in
11 cm	4.33 in
12 cm	4.72 in
13 cm	5.12 in
14 cm	5.51 in
15 cm	5.91 in
16 cm	6.30 in
17 cm	6.69 in
18 cm	7.09 in
19 cm	7.48 in
20 cm	7.87 in
21 cm	8.27 in
22 cm	8.66 in
23 cm	9.06 in
24 cm	9.45 in
25 cm	9.84 in
26 cm	10.24 in
27 cm	10.63 in
28 cm	11.02 in
29 cm	11.42 in
30 cm	11.81 in
31 cm	12.20 in
32 cm	12.60 in
33 cm	12.99 in
34 cm	13.39 in
35 cm	13.78 in
36 cm	14.17 in
37 cm	14.57 in
38 cm	14.96 in
39 cm	15.35 in
40 cm	15.75 in
41 cm	16.14 in
42 cm	16.54 in
43 cm	16.93 in
44 cm	17.32 in
45 cm	17.72 in
46 cm	18.11 in
47 cm	18.50 in
48 cm	18.90 in
49 cm	19.29 in
50 cm	19.69 in

Medium Scale & Furniture Dimensions (51 cm to 100 cm)

Ideal for appliance dimensions, home DIY projects, standard household fixtures, and luggage sizes.

Centimeters (cm)	Inches (in)
51 cm	20.08 in
52 cm	20.47 in
53 cm	20.87 in
54 cm	21.26 in
55 cm	21.65 in
56 cm	22.05 in
57 cm	22.44 in
58 cm	22.83 in
59 cm	23.23 in
60 cm	23.62 in
61 cm	24.02 in
62 cm	24.41 in
63 cm	24.80 in
64 cm	25.20 in
65 cm	25.59 in
66 cm	25.98 in
67 cm	26.38 in
68 cm	26.77 in
69 cm	27.17 in
70 cm	27.56 in
71 cm	27.95 in
72 cm	28.35 in
73 cm	28.74 in
74 cm	29.13 in
75 cm	29.53 in
76 cm	29.92 in
77 cm	30.31 in
78 cm	30.71 in
79 cm	31.10 in
80 cm	31.50 in
81 cm	31.89 in
82 cm	32.28 in
83 cm	32.68 in
84 cm	33.07 in
85 cm	33.46 in
86 cm	33.86 in
87 cm	34.25 in
88 cm	34.65 in
89 cm	35.04 in
90 cm	35.43 in
91 cm	35.83 in
92 cm	36.22 in
93 cm	36.61 in
94 cm	37.01 in
95 cm	37.40 in
96 cm	37.80 in
97 cm	38.19 in
98 cm	38.58 in
99 cm	38.98 in
100 cm	39.37 in

Human Height & Large Household Items (101 cm to 150 cm)

Quick reference for standard youth and adult heights, tall shelving units, and standard window dimensions.

Centimeters (cm)	Inches (in)
101 cm	39.76 in
102 cm	40.16 in
103 cm	40.55 in
104 cm	40.94 in
105 cm	41.34 in
106 cm	41.73 in
107 cm	42.13 in
108 cm	42.52 in
109 cm	42.91 in
110 cm	43.31 in
111 cm	43.70 in
112 cm	44.09 in
113 cm	44.49 in
114 cm	44.88 in
115 cm	45.28 in
116 cm	45.67 in
117 cm	46.06 in
118 cm	46.46 in
119 cm	46.85 in
120 cm	47.24 in
121 cm	47.64 in
122 cm	48.03 in
123 cm	48.43 in
124 cm	48.82 in
125 cm	49.21 in
126 cm	49.61 in
127 cm	50.00 in
128 cm	50.39 in
129 cm	50.79 in
130 cm	51.18 in
131 cm	51.57 in
132 cm	51.97 in
133 cm	52.36 in
134 cm	52.76 in
135 cm	53.15 in
136 cm	53.54 in
137 cm	53.94 in
138 cm	54.33 in
139 cm	54.72 in
140 cm	55.12 in
141 cm	55.51 in
142 cm	55.91 in
143 cm	56.30 in
144 cm	56.69 in
145 cm	57.09 in
146 cm	57.48 in
147 cm	57.87 in
148 cm	58.27 in
149 cm	58.66 in
150 cm	59.06 in

Room Dimensions & Extended Lengths (151 cm to 200 cm)

Useful for architectural planning, standard mattress lengths, full-length mirrors, and door frames.

Centimeters (cm)	Inches (in)
151 cm	59.45 in
152 cm	59.84 in
153 cm	60.24 in
154 cm	60.63 in
155 cm	61.02 in
156 cm	61.42 in
157 cm	61.81 in
158 cm	62.20 in
159 cm	62.60 in
160 cm	62.99 in
161 cm	63.39 in
162 cm	63.78 in
163 cm	64.17 in
164 cm	64.57 in
165 cm	64.96 in
166 cm	65.35 in
167 cm	65.75 in
168 cm	66.14 in
169 cm	66.54 in
170 cm	66.93 in
171 cm	67.32 in
172 cm	67.72 in
173 cm	68.11 in
174 cm	68.50 in
175 cm	68.90 in
176 cm	69.29 in
177 cm	69.69 in
178 cm	70.08 in
179 cm	70.47 in
180 cm	70.87 in
181 cm	71.26 in
182 cm	71.65 in
183 cm	72.05 in
184 cm	72.44 in
185 cm	72.83 in
186 cm	73.23 in
187 cm	73.62 in
188 cm	74.02 in
189 cm	74.41 in
190 cm	74.80 in
191 cm	75.20 in
192 cm	75.59 in
193 cm	75.98 in
194 cm	76.38 in
195 cm	76.77 in
196 cm	77.17 in
197 cm	77.56 in
198 cm	77.95 in
199 cm	78.35 in
200 cm	78.74 in

Doorways, Vehicles & Extra-Tall Items (201 cm to 250 cm)

Handy for door frame heights, refrigerators, tall wardrobes, curtain drops, and vehicle dimensions.

Centimeters (cm)	Inches (in)
201 cm	79.13 in
202 cm	79.53 in
203 cm	79.92 in
204 cm	80.31 in
205 cm	80.71 in
206 cm	81.10 in
207 cm	81.50 in
208 cm	81.89 in
209 cm	82.28 in
210 cm	82.68 in
211 cm	83.07 in
212 cm	83.46 in
213 cm	83.86 in
214 cm	84.25 in
215 cm	84.65 in
216 cm	85.04 in
217 cm	85.43 in
218 cm	85.83 in
219 cm	86.22 in
220 cm	86.61 in
221 cm	87.01 in
222 cm	87.40 in
223 cm	87.80 in
224 cm	88.19 in
225 cm	88.58 in
226 cm	88.98 in
227 cm	89.37 in
228 cm	89.76 in
229 cm	90.16 in
230 cm	90.55 in
231 cm	90.94 in
232 cm	91.34 in
233 cm	91.73 in
234 cm	92.13 in
235 cm	92.52 in
236 cm	92.91 in
237 cm	93.31 in
238 cm	93.70 in
239 cm	94.09 in
240 cm	94.49 in
241 cm	94.88 in
242 cm	95.28 in
243 cm	95.67 in
244 cm	96.06 in
245 cm	96.46 in
246 cm	96.85 in
247 cm	97.24 in
248 cm	97.64 in
249 cm	98.03 in
250 cm	98.43 in

Whether you are measuring a small craft project or checking the dimensions of a new piece of furniture, converting centimeters to inches is always a quick and straightforward process. Bookmark this page so you have this handy conversion calculator and full reference table ready the exact moment you need it.