Centimeter to Inch Converter
Enter the value that you want to convert centimeter (cm) to inch (in) or inch to centimeter.Also written as CM to IN conversion.
1 centimeter = 0.3937008 inch
Formula: inch = centimeter value × 0.3937008
CM to IN — centimeter to inch
10 centimeter = 3.93701 inch
Popular Length Converters:
Centimeters to Inches for Screen Sizes & Manufacturing
Display sizes are marketed in inches worldwide (even in metric countries), but physical measurements for cases, mounts, and furniture use centimeters. Clothing sizes, paper formats (A4 vs Letter), and machining tolerances all require converting between these units. A phone listed as 6.7 inches needs a case measured in centimeters.
Centimeter to Inch: The Essentials
What is Centimeter?
Centimeter (cm) is a unit of length measurement. 1 centimeter is equal to 0.3937008 inch.
The Inch Explained
Inch (in) is a unit of length measurement. 1 inch is equal to 2.5400000 centimeter.
Length Conversions in Practice
Length conversions connect the metric system used by most of the world with the imperial system still dominant in the United States, UK construction, and aviation. Architects convert between meters and feet for international projects. Machinists work in thousandths of an inch while referencing metric specifications. Runners compare kilometer race distances to miles. Screen sizes, paper formats, and fabric measurements all require frequent conversion between systems.
centimeter to inch metric conversion table
| 0.01 cm | = | 0.00394 in |
| 0.1 cm | = | 0.03937 in |
| 1 cm | = | 0.39370 in |
| 2 cm | = | 0.78740 in |
| 3 cm | = | 1.18110 in |
| 4 cm | = | 1.57480 in |
| 5 cm | = | 1.96850 in |
| 6 cm | = | 2.36220 in |
| 7 cm | = | 2.75591 in |
| 8 cm | = | 3.14961 in |
| 9 cm | = | 3.54331 in |
| 10 cm | = | 3.93701 in |
| 11 cm | = | 4.33071 in |
| 12 cm | = | 4.72441 in |
| 13 cm | = | 5.11811 in |
| 14 cm | = | 5.51181 in |
| 15 cm | = | 5.90551 in |
| 16 cm | = | 6.29921 in |
| 17 cm | = | 6.69291 in |
| 18 cm | = | 7.08661 in |
| 19 cm | = | 7.48031 in |
| 20 cm | = | 7.87402 in |
| 30 cm | = | 11.81102 in |
| 40 cm | = | 15.74803 in |
| 50 cm | = | 19.68504 in |
| 60 cm | = | 23.62205 in |
| 70 cm | = | 27.55906 in |
| 80 cm | = | 31.49606 in |
| 90 cm | = | 35.43307 in |
| 100 cm | = | 39.37008 in |
| 200 cm | = | 78.74016 in |
| 300 cm | = | 118.11024 in |
| 400 cm | = | 157.48031 in |
| 500 cm | = | 196.85039 in |
| 600 cm | = | 236.22047 in |
| 700 cm | = | 275.59055 in |
| 800 cm | = | 314.96063 in |
| 900 cm | = | 354.33071 in |
| 1000 cm | = | 393.70079 in |
How to Convert CM to IN (Centimeter to Inch)?
We can convert centimeter to inch by using an example.
Example:
Convert 20 Centimeter to Inch?
We know 1 Centimeter = 0.3937008 inch; 1 Inch = 2.5400000 centimeter.
20 centimeter = ___in
20 × 0.3937008 = 7.87402 in (we know 1 centimeter = 0.3937008 inch)
Answer:
20 centimeter = 7.87402 inch
How to Convert Centimeters to Inches (Step-by-Step)
Converting centimeters to inches is one of the most common unit conversions, used daily for screen sizes, clothing measurements, and paper formats. Since 1 inch equals exactly 2.54 cm, dividing by 2.54 gives you inches.
- Write down the measurement in centimeters (cm).
- Divide the cm value by 2.54 (or multiply by 0.393701).
- The result is the equivalent length in inches.
Common Centimeter to Inch Conversions
Reference chart of frequently encountered cm-to-inch conversions for screens, clothing, and everyday objects.
| Centimeter | Inch |
|---|---|
| 2.54 cm | 1 inch |
| 10 cm | 3.94 inches |
| 13.97 cm | 5.5 inches |
| 21 cm | 8.27 inches |
| 29.7 cm | 11.69 inches |
| 54.61 cm | 21.5 inches |
| 80 cm | 31.5 inches |
| 138.68 cm | 54.6 inches |
Solved Examples: cm to Inches
Question 1: A phone screen measures 16.26 cm diagonally. What is this in inches?
Solution:
Use the formula: inches = cm ÷ 2.54
= 16.26 ÷ 2.54
= 6.4 inches
Answer: 16.26 cm = 6.4 inches (a standard 6.4" phone display)
Question 2: Convert an A4 paper width of 21.0 cm to inches.
Solution:
inches = 21.0 ÷ 2.54
= 8.2677 inches
≈ 8.27 inches
Answer: 21.0 cm ≈ 8.27 inches (slightly narrower than US Letter at 8.5")
Question 3: A EU clothing label says chest width is 52 cm. What is this in inches?
Solution:
inches = 52 ÷ 2.54
= 20.47 inches
This represents half-chest; full chest = 40.94 inches
Answer: 52 cm = 20.47 inches (half-chest measurement for size M/L)
Question 4: A 165 cm TV has what diagonal in inches?
Solution:
inches = 165 ÷ 2.54
= 64.96 inches
≈ 65 inches
Answer: 165 cm ≈ 65 inches (marketed as a 65" television)
Practice Questions
Try solving these on your own to test your understanding:
- Convert 30.48 cm to inches. (Answer: 12 inches = 1 foot)
- A tablet screen is 26.67 cm diagonal. How many inches is that? (Answer: 10.5 inches)
- Convert 91.44 cm to inches. (Answer: 36 inches = 1 yard)
- A picture frame is 45 cm wide. What is this in inches? (Answer: 17.72 inches)
- Convert 127 cm to inches. (Answer: 50 inches)
Screen Sizes: Why TVs and Phones Use Inches
The electronics industry measures screen diagonals in inches worldwide, even in metric countries. This dates back to the dominance of American and Japanese TV manufacturers who standardized on imperial measurements. When shopping for a TV advertised as 55 inches, the actual diagonal is 139.7 cm. Common screen sizes: 5.5" phone = 14 cm, 10.9" tablet = 27.7 cm, 24" monitor = 61 cm, 55" TV = 139.7 cm, 75" TV = 190.5 cm.
Clothing Size Conversion: EU (cm) to US/UK (inches)
European clothing uses centimeters while US/UK sizes use inches. For waist measurements: EU 70 = US 27.5", EU 75 = US 29.5", EU 80 = US 31.5", EU 85 = US 33.5", EU 90 = US 35.4". For shirts, the EU collar size in cm divided by 2.54 gives the US size. A EU 40 collar = 15.75" (US size 16). Always check specific brand size charts as fit varies.
Paper Sizes: A-Series (cm) vs US (inches)
The international A-series paper standard uses millimeters/centimeters, while North America uses inches. Key comparisons: A4 (21.0 × 29.7 cm) is close to but not identical to US Letter (8.5 × 11 inches = 21.59 × 27.94 cm). A4 is slightly narrower and taller. A3 (29.7 × 42.0 cm) equals 11.69 × 16.54 inches, close to US Tabloid (11 × 17 inches). This difference causes formatting issues when printing documents across regions.
Key Takeaways
- Divide centimeters by 2.54 to get inches (1 inch = 2.54 cm exactly).
- Quick estimate: multiply cm by 0.4 for approximate inches.
- Screen sizes are always in inches: 55" TV = 139.7 cm diagonal.
- EU clothing sizes in cm ÷ 2.54 = approximate US size in inches.
- A4 paper (21 × 29.7 cm) is slightly different from US Letter (8.5 × 11").
- 10 cm ≈ 4 inches is a useful anchor point for mental math.
Centimeter to Inch Conversion Formula
inch = centimeter × 0.3937008
1 centimeter = 0.3937008 inch
1 inch = 2.5400000 centimeter
Reverse: centimeter = inch × 2.5400000
Frequently Asked Questions
How many inch are in 1 centimeter?
There are 0.3937008 inch in 1 centimeter. To convert centimeter to inch, multiply the value by 0.3937008.
How do I convert centimeter to inch?
Multiply your centimeter value by 0.3937008 to get the equivalent in inch. For example, 5 centimeter = 5 × 0.3937008 = 1.96850 inch.
How do I convert inch to centimeter?
Multiply your inch value by 2.5400000 to get the equivalent in centimeter. Alternatively, divide by 0.3937008.
What is 10 centimeter in inch?
10 centimeter is equal to 3.93701 inch.
What is 100 centimeter in inch?
100 centimeter is equal to 39.37008 inch.