Inches to Centimeters Converter (in to cm)

Type a value in inches to see it in centimeters instantly.

1 inch (in) = 2.54 centimeters (cm)

1 centimeter (cm) = 0.393700787 inches (in)

12 in = 30.48 cm

Open in the full converter to compare with other length units.

How to convert inches to centimeters

Multiply the number of inches by 2.54.

cm = in × 2.54

Example: 12 in × 2.54 = 30.48 cm

Screen sizes in inches are measured diagonally: a 27-inch monitor has a 68.6 cm diagonal, and a 65-inch TV has a 165.1 cm diagonal.

in to cm conversion table

Inches (in)Centimeters (cm)
0.25 in0.635 cm
0.5 in1.27 cm
1 in2.54 cm
2 in5.08 cm
3 in7.62 cm
4 in10.16 cm
5 in12.7 cm
6 in15.24 cm
7 in17.78 cm
8 in20.32 cm
9 in22.86 cm
10 in25.4 cm
12 in30.48 cm
13 in33.02 cm
14 in35.56 cm
15 in38.1 cm
16 in40.64 cm
17 in43.18 cm
18 in45.72 cm
20 in50.8 cm
24 in60.96 cm
27 in68.58 cm
32 in81.28 cm
36 in91.44 cm
48 in121.92 cm
55 in139.7 cm
65 in165.1 cm

About the units

Inch (in)

Since 1959 the international inch has been defined as exactly 2.54 centimeters. It is used in the US and UK for screen sizes, tools, timber and many manufactured parts.

Centimeter (cm)

A centimeter (centimetre) is one hundredth of a meter. It is the everyday metric unit for body height, clothing sizes and small objects.

Frequently asked questions

How many centimeters are in 1 inch?

1 inch equals 2.54 centimeters.

How do I convert inches to centimeters?

Multiply the number of inches by 2.54. For example, 12 in × 2.54 = 30.48 cm.

How many inches are in 1 centimeter?

1 centimeter equals 0.393700787 inches.

Is the inch-to-centimeter factor exact?

Yes. Since 1959 one inch has been defined as exactly 2.54 cm, so the conversion involves no rounding.

How many cm is 12 inches?

12 inches (one foot) is exactly 30.48 cm.

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