CM to Inches Converter
Centimeters to Inches Conversion Table
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 cm | 0.393701 in |
| 2 cm | 0.787402 in |
| 5 cm | 1.968504 in |
| 10 cm | 3.937008 in |
| 15 cm | 5.905512 in |
| 20 cm | 7.874016 in |
| 25 cm | 9.84252 in |
| 50 cm | 19.685039 in |
| 75 cm | 29.527559 in |
| 100 cm | 39.370079 in |
Convert centimeters to inches instantly. Accurate cm-to-inch converter with a handy reference table. Free, private, runs entirely in your browser.
How to Use CM to Inches Converter
- Enter the number of centimeters you want to convert in the input field.
- The equivalent value in inches appears instantly in the result field.
- Use the copy button to copy the result to your clipboard.
- Check the conversion table below for common centimeter-to-inch values.
What is Centimeters to Inches Conversion?
Centimeters to inches conversion transforms metric length measurements into the imperial system used primarily in the United States. The centimeter (cm) is a unit in the International System of Units (SI) equal to one hundredth of a meter. The inch is an imperial unit used in the US, UK (for some purposes), and Canada (informally). Since 1959, the inch has been defined as exactly 2.54 centimeters by international agreement, making this conversion exact rather than approximate.
The Conversion Formula
The formula is: inches = cm / 2.54. Since 1 inch equals exactly 2.54 centimeters, dividing any centimeter measurement by 2.54 gives the precise equivalent in inches. Alternatively, you can multiply by 0.3937 (the reciprocal of 2.54). For quick mental math, divide by 2.5 for a rough estimate that is about 1.6% too high. For example, 10 cm / 2.5 = 4 inches (exact answer is 3.937 inches). This approximation works well for everyday estimates where high precision is not required.
Common Use Cases
- Converting European clothing and shoe size measurements to US equivalents
- Interpreting furniture dimensions from international manufacturers
- Understanding screen sizes listed in centimeters (common in some markets)
- Converting body measurements from medical records using metric units
- Adapting engineering and construction specifications between systems
- Comparing paper sizes (A4 is 21 x 29.7 cm, approximately 8.27 x 11.69 inches)
Common Centimeter to Inch Equivalents
Several cm-to-inch conversions come up frequently in daily life. A standard credit card is about 8.5 cm (3.35 inches) wide. A4 paper is 21 cm (8.27 inches) wide and 29.7 cm (11.69 inches) tall, while US Letter paper is 8.5 x 11 inches (21.59 x 27.94 cm). A standard smartphone screen is typically 14-17 cm (5.5-6.7 inches) diagonally. Human height conversions are also common: 170 cm equals approximately 66.93 inches (5 feet 6.9 inches), and 180 cm equals approximately 70.87 inches (5 feet 10.9 inches). Knowing these reference points helps you quickly gauge metric measurements without a calculator.
For the reverse conversion, use the Inches to Centimeters Converter. For other length conversions, try Feet to Meters or the Unit Converter.