Convert inches to cm (2024)

Convert inches to cm (1)

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Please provide values below to convert inch [in] to centimeter [cm], or vice versa.


Definition: An inch (symbol: in) is a unit of length in the imperial and US customary systems of measurement. An inch was defined to be equivalent to exactly 25.4 millimeters in 1959. There are 12 inches in a foot and 36 inches in a yard.

History/origin: The term "inch" was derived from the Latin unit "uncia" which equated to "one-twelfth" of a Roman foot.

There have been a number of different standards for the inch in the past, with the current definition being based on the international yard. One of the earliest definitions of the inch was based on barleycorns, where an inch was equal to the length of three grains of dry, round barley placed end-to-end. Another version of the inch is also believed to have been derived from the width of a human thumb, where the length was obtained from averaging the width of three thumbs: a small, a medium, and a large one.

Current use: The inch is mostly used in the United States, Canada, and the United Kingdom. It is also sometimes used in Japan (as well as other countries) in relation to electronic parts, like the size of display screens.


Definition: A centimeter (symbol: cm) is a unit of length in the International System of Units (SI), the current form of the metric system. It is defined as 1/100 meters.

History/origin: A centimeter is based on the SI unit meter, and as the prefix "centi" indicates, is equal to one hundredth of a meter. Metric prefixes range from factors of 10-18 to 1018 based on a decimal system, with the base (in this case the meter) having no prefix and having a factor of 1. Learning some of the more commonly used metric prefixes, such as kilo-, mega-, giga-, tera-, centi-, milli-, micro-, and nano-, can be helpful for quickly navigating metric units.

Current use: The centimeter, like the meter, is used in all sorts of applications worldwide (in countries that have undergone metrication) in instances where a smaller denomination of the meter is required. Height is commonly measured in centimeters outside of countries like the United States.

Inch to Centimeter Conversion Table

Inch [in]Centimeter [cm]
0.01 in0.0254 cm
0.1 in0.254 cm
1 in2.54 cm
2 in5.08 cm
3 in7.62 cm
5 in12.7 cm
10 in25.4 cm
20 in50.8 cm
50 in127 cm
100 in254 cm
1000 in2540 cm

How to Convert Inch to Centimeter

1 in = 2.54 cm
1 cm = 0.3937007874 in

Example: convert 15 in to cm:
15 in = 15 × 2.54 cm = 38.1 cm

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Convert inches to cm (2024)


Convert inches to cm? ›

There are 2.54 centimeters in 1 inch. Using the conversion number of 0.3937, the conversion formula for converting x centimeters to inches is this: x centimeters * 0.3937 = inches.

What is the solution for cm to inches? ›

There are 2.54 centimeters in 1 inch. Using the conversion number of 0.3937, the conversion formula for converting x centimeters to inches is this: x centimeters * 0.3937 = inches.

Is 2.5 cm the same as 1 inch? ›

This tells you that 2.5 cm is the same as 0.984252 inches. Notice that 0.984252 is very close to 1! Actually, to get to a full inch, you'd need to have 2.54 centimeters.

How do you convert 1 cm to inches? ›

As we know that one centimeter is approximately equal to 0.393701 inches, the conversion from the unit centimeters to inches can be performed easily. Thus to convert cm to inches, multiply the given centimeter value by 0.393701.

How do you convert inches to centimeters for free? ›

1 inch = 2.54 cm So, to convert inches to centimeters, multiply the number of inches by 2.54. For example, if you have 5 inches, you would multiply 5 by 2.54: 5 inches * 2.54 cm/inch = 12.7 cm Therefore, 5 inches is equal to 12.7 centimeters.

How to mentally convert cm to inches? ›

All you need to do is multiply the number of centimeters by 0.39 to get the equivalent measurement in inches. For example, if you have 20 centimeters, you would multiply 20 by 0.39 to get 7.8 inches.

How to convert inches to cm in head? ›

As all the other answers have said, an inch is 2.54 centimetres. In fact 2.5 is near enough. So multiply by 4 (fairly easy to do in your head) and divide by 10 (even easier).

How do you factor inches into centimeters? ›

To convert inches to centimeters, multiply the length in inches by 2.54, as 1 inch is approximately equal to 2.54 centimeters. Why is the conversion factor 2.54 for inches to centimeters?

How do you convert cm to inches and feet? ›

Step 1: Convert cm to inches: Divide the length value by 2.54. Step 2: Now divide the obtained value in step 1 by 12 to get value in feet. Step 3: Subtract the product of 12 and obtained feet in step 2 from obtained value in step 1. Step 4: Now, write the value of length in feet and inches.

How do you convert inches to centimeters? ›

1 inch is equal to 2.54 centimeters. It means that to convert inches to centimeters multiply the given figure by 2.54.

What does 1 cm look like in inches? ›

1 CM = 0.393701 Inches.

What is the actual size of 1 inch to cm? ›

2.54 cm

What mean 5 inches in cm? ›

Answer and Explanation:

1 inch is approximately 2.54 centimeters, and there are 5 inches, so 5 ∗ 2.54 = 12.7 c m , meaning 5 inches is around 12.7 centimeters.

How many centimeters is 12 inches? ›

By the unitary method, 12 inches = 30.48 centimeters, but it shows only 30 cm on the ruler.

What is 9 inches in centimeters? ›

So, 9 inches is equal to 22.86 centimeters.


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