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Formula to Convert Cm to Inches and Convert Inches to Cm
How many inches in cm ?
Formula to convert centimeters (cm) to inches (in):
inches = centimeters * 0.393701
For example, to convert 10 centimeters to inches, multiply by 0.393701:
10 cm * 0.393701 = 3.93701 in
How many centimeters in an inch? (cm to inches)
Formula to convert inches (in) to centimeters (cm):
centimeters = inches * 2.54
To convert 3 inches to centimeters, multiply by 2.54:
3 in * 2.54 = 7.62 cm
Cm to Inch Conversion: Everything You Need to Know

The centimeter is the base unit of length in the metric system.
The inch is the base unit of length in the US Customary Units and British Imperial Units systems of measurement.
One inch is equal to 2.54 centimeters. One centimeter is equal to 0.393701 inches.
- Centimeters are commonly used to measure small objects, such as rulers, pencils, and coins.
- Inches are commonly used to measure larger objects, such as lumber, furniture, and appliances.
- Many countries around the world use the metric system, but the United States and the United Kingdom still use the US Customary Units and British Imperial Units systems of measurement.
- The word "centimeter" comes from the Latin words "centum" (meaning "hundred") and "metrum" (meaning "meter"). It was first defined in the 18th century as one one-hundredth of a meter.
- The word "inch" comes from the Old English word "ynce", which means "thumb". It is thought to have originated from the practice of measuring the width of a thumb to determine the length of an inch.
- The inch is a much older unit of measurement than the centimeter. It has been used in England since at least the 10th century. The centimeter was only first defined in the 18th century, as part of the development of the metric system.
- The first ruler with both centimeters and inches was invented in the 19th century
Here is a cm vs inch comparison table:
Characteristic | Centimeter (cm) | Inch (in) |
---|---|---|
System of measurement | Metric system | US Customary Units and British Imperial Units |
Definition | One one-hundredth of a meter | One-twelfth of a foot |
Equivalent to | 0.393701 inches | 2.54 centimeters |
Common uses | Measuring small objects, clothing, textile items, engineering drawings, communicating with people in other countries | Measuring larger objects, furniture, appliances, building materials, communicating with people in the United States and Canada |
Symbol | cm | in |
Use centimeters when:
- Measuring small objects, such as coins, screws, or jewelry.
- Measuring clothing or other textile items.
- Working with engineering or manufacturing drawings.
- Communicating with people in other countries, as the metric system is the international system of units.
Use inches when:
- Measuring larger objects, such as furniture, appliances, or building materials.
- Working with US Customary Units or British Imperial Units.
- Buying or selling items that are typically measured in inches, such as lumber, hardware, or clothing.
- Communicating with people who are more familiar with inches.
Here are some interesting examples of cm to inch conversions:
- The average human height is about 170 centimeters, which is equal to 66.93 inches.
- The average length of a human fingernail is about 1 centimeter, which is equal to 0.393701 inches.
- The average human thumb is about 2.5 centimeters wide. This means that it is about one inch wide.
- A standard pencil is about 18 centimeters long. This means that it is about 7 inches long.
- The average length of a football field is 100 yards, which is equal to 91.44 meters, which is equal to 358.76 inches.
- The average diameter of a basketball is 24.6 centimeters, which is equal to 9.69 inches.
- The average diameter of a baseball is 7 centimeters, which is equal to 2.75 inches.
Note: The above content has input from Bard, the AI model from Google.
Centimeter to Inches (cm to inch) Conversion Table

Centimeter (cm) | Inch (inches) |
---|---|
2 cm | 0.787 inches |
3 cm | 1.181 inches |
3.5 cm | 1.378 inches |
5 cm | 1.969 inches |
6 cm | 2.362 inches |
7 cm | 2.756 inches |
8 cm | 3.15 inches |
9 cm | 3.543 inches |
10 cm | 3.937 inches |
11 cm | 4.331 inches |
12 cm | 4.724 inches |
13 cm | 5.118 inches |
15 cm | 5.906 inches |
16 cm | 6.299 inches |
17 cm | 6.693 inches |
18 cm | 7.087 inches |
19 cm | 7.48 inches |
20 cm | 7.874 inches |
21 cm | 8.268 inches |
22 cm | 8.661 inches |
23 cm | 9.055 inches |
24 cm | 9.449 inches |
25 cm | 9.843 inches |
26 cm | 10.236 inches |
27 cm | 10.63 inches |
29 cm | 11.417 inches |
30 cm | 11.811 inches |
32 cm | 12.598 inches |
33 cm | 12.992 inches |
35 cm | 13.78 inches |
38 cm | 14.961 inches |
40 cm | 15.748 inches |
42 cm | 16.535 inches |
45 cm | 17.717 inches |
48 cm | 18.898 inches |
50 cm | 19.685 inches |
52 cm | 20.472 inches |
53 cm | 20.866 inches |
54 cm | 21.26 inches |
Inches to Centimeters (inches to cm) Conversion Table

Inch (inches) | Centimeter (cm) |
---|---|
1 inches | 2.54 cm |
1.5 inch | 3.81 cm |
2 inches | 5.08 cm |
3 inches | 7.62 cm |
3.5 inches | 8.89 cm |
4 inches | 10.16 cm |
4.5 inches | 11.43 cm |
5 inches | 12.7 cm |
5.5 inches | 13.97 cm |
6 inches | 15.24 cm |
6.5 inches | 16.51 cm |
7 inches | 17.78 cm |
8 inches | 20.32 cm |
8.5 inches | 21.59 cm |
9 inches | 22.86 cm |
9.5 inches | 24.13 cm |
10 inches | 25.4 cm |
11 inches | 27.94 cm |
12 inches | 30.48 cm |
13 inches | 33.02 cm |
14 inches | 35.56 cm |
7.5 inches | 19.05 cm |
15 inches | 38.1 cm |
16 inches | 40.64 cm |
17 inches | 43.18 cm |
19 inches | 48.26 cm |
18 inches | 45.72 cm |
20 inches | 50.8 cm |
21 inches | 53.34 cm |
22 inch | 55.88 cm |
23 inches | 58.42 cm |
24 inches | 60.96 cm |
25 inches | 63.5 cm |
26 inches | 66.04 cm |
27 inches | 68.58 cm |
28 inches | 71.12 cm |
30 inches | 76.2 cm |
31 inch | 78.74 cm |
32 inches | 81.28 cm |
Frequently Asked Questions on Converting Cm to Inches and Inches to Cm

11.811 inches
11.811 inches
23.622 inches
23.622 inches
19.685 inches
19.685 inches
15.748 inches
15.748 inches
7.874 inches
7.874 inches
5.906 inches
5.906 inches
9.843 inches
9.843 inches
7.087 inches
7.087 inches
31.496 inches
31.496 inches
47.244 inches
47.244 inches
35.433 inches
35.433 inches
3.937 inches
3.937 inches
12.7 cm
12.7 cm
5.906 inches
5.906 inches
3.937 inches
3.937 inches