Inch to Centimeter Converter (in to cm)

1 inch = 2.54 centimeter. The inch is the everyday length unit in the US and, for screens and tools, in many other countries, while the centimeter is the metric unit used almost everywhere else.

Value

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Result

76.2

30 in = 76.2 cm

How to convert inch to centimeter

The inch is the everyday length unit in the US and, for screens and tools, in many other countries, while the centimeter is the metric unit used almost everywhere else. By international agreement since 1959, one inch is defined as exactly 2.54 centimeters, so this conversion is exact rather than approximate.

Formula

cm = in × 2.54

Worked example

30 in × 2.54 = 76.2 cm

Inch to Centimeter quick-reference table

Common inch to centimeter values
Inch (in)	Centimeter (cm)
1 in	2.54 cm
5 in	12.7 cm
10 in	25.4 cm
25 in	63.5 cm
50 in	127 cm
100 in	254 cm

Real-life examples

A 30 in waist, a 27 in monitor or a 24 in carry-on bag becomes a metric figure when you shop online from a shop that lists sizes in centimeters.

Frequently asked questions

How tall is 170 cm in feet and inches?

170 cm is 66.93 inches, which is 5 feet 6.93 inches (about 5 ft 7 in).

Is 2.54 an exact number?

Yes. Since the 1959 international yard and pound agreement, 1 inch is exactly 2.54 cm, so there is no rounding in the factor itself.

Is cm to inch the same as cm to inches?

Yes. "Inch" is the unit name and "inches" is its plural, so both searches use the same conversion.

What is 1 inch in centimeter?

1 inch = 2.54 centimeter (in to cm).

What is the formula to convert in to cm?

cm = in × 2.54. For example, 30 in × 2.54 = 76.2 cm.

How do I convert cm back to in?

Use the reverse converter: 1 centimeter = 0.393701 inch. Check: 76.2 cm converts back to 30 in.

Reverse conversion

Need the other direction? Centimeter to Inch converter (cm to in): 1 centimeter = 0.393701 inch.

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