Centimeter to Inch Converter
PrintCentimeter to Inch Conversion Table
| Centimeter (cm) | Inch (in) |
|---|---|
| 0.01 cm | 0.0039370079 in |
| 0.1 cm | 0.0393700787 in |
| 1 cm | 0.3937007874 in |
| 2 cm | 0.7874015748 in |
| 3 cm | 1.1811023622 in |
| 5 cm | 1.968503937 in |
| 10 cm | 3.937007874 in |
| 20 cm | 7.874015748 in |
| 50 cm | 19.68503937 in |
| 100 cm | 39.37007874 in |
| 1000 cm | 393.7007874 in |
Inches and centimeters are the two primary units used globally to express TV and monitor display screen sizes, apparel waist circumferences, photo frame dimensions, body height, and woodworking lumber cuts. While the inch (in) is the standard customary unit used in the United States, Canada, the United Kingdom, and global consumer electronics, the centimeter (cm) is the standard metric subunit used across Continental Europe, Asia, Latin America, and international manufacturing.
Our free online Inches to Cm Converter provides instant, high-precision length conversions in both directions:
- Inches to Centimeters: Multiply inches by
2.54(exact international standard). - Centimeters to Inches: Divide centimeters by
2.54(or multiply by0.39370079).
Exact Conversion Formulas: Inches & Centimeters
Since the International Yard and Pound Agreement of 1959, one international inch is defined as exactly 2.54 centimeters (25.4 millimeters). This establishes exact mathematical relationships:
| Conversion Direction | Exact Mathematical Formula | Quick Mental Approximation Rule |
|---|---|---|
| Inches to Centimeters | Centimeters = Inches × 2.54 |
Multiply inches by 2.5 (e.g., 10 in × 2.5 = 25 cm). |
| Centimeters to Inches | Inches = Centimeters ÷ 2.54 |
Multiply cm by 0.4 (e.g., 50 cm × 0.4 = 20 inches). |
Step-by-Step Calculation Example
To convert 15 inches to centimeters:
15 in × 2.54 = 38.1 centimeters
Thus, 15 inches is equal to exactly 38.1 cm.
Inch to Centimeter Conversion Table
Below is a quick reference lookup table converting customary measurements from 0.01 inches up to 1,000 inches:
| Inches (in) | Centimeters (cm) | Electronics, Consumer & Sizing Benchmark |
|---|---|---|
| 0.01 in | 0.0254 cm | 0.254 mm (fine wire diameter) |
| 0.10 in | 0.2540 cm | Standard IC pin spacing (100 mil) |
| 1.00 in | 2.5400 cm | 1.0 Inch Exact International Benchmark |
| 2.00 in | 5.0800 cm | 2-inch photo frame / pipe diameter |
| 6.10 in | 15.4940 cm | Standard smartphone display diagonal (6.1″) |
| 10.50 in | 26.6700 cm | Tablet screen diagonal (10.5″) |
| 12.00 in (1 Foot) | 30.4800 cm | Standard 12-inch school ruler (30.48 cm) |
| 15.60 in | 39.6240 cm | Standard laptop screen diagonal (15.6″) |
| 32.00 in | 81.2800 cm | Medium apparel waist size / 32″ TV display |
| 55.00 in | 139.7000 cm | Living room 4K TV screen diagonal (55″) |
| 100.00 in | 254.0000 cm | Home theater projector screen (100″ = 2.54 m) |
| 1,000.00 in | 2,540.0000 cm | 25.4 Meters |
History & Standards: Inch vs. Centimeter
The Definition of the Inch (in)
The English word inch derives from the Latin uncia (meaning 1/12th part of a Roman foot pes). Medieval folk definitions included King Edward II’s 1324 decree establishing an inch as the length of 3 dry, round barleycorns laid end-to-end, as well as standards based on the width of human thumbs. In 1959, international standards bureaus locked the inch to the metric system as exactly 2.54 centimeters (25.4 mm). Today, display screen manufacturers worldwide continue to specify TV, smartphone, and laptop diagonals in inches regardless of local country metrication.
The Definition of the Centimeter (cm)
The centimeter is a decimal submultiple of the meter in the International System of Units (SI). Derived from the Latin centum (meaning hundred), 1 cm equals 1/100th of a meter. Established in 1791 during the French Revolution, the centimeter is used worldwide for body height, medical charts, fabric tailoring, and architectural plans.
To convert centimeters back to inches, use our Cm to Inches Converter. For height conversions in feet and inches, check our Inches to Feet Converter or Height Calculator. For general unit transformations, explore our Conversion Calculator.
Frequently Asked Questions (FAQ)
How many centimeters are in 1 inch?
There are exactly 2.54 centimeters in 1 inch.
How many inches are in 1 centimeter?
There are approximately 0.393701 inches in 1 centimeter (1 ÷ 2.54).
What is a 55-inch TV screen size in centimeters?
A 55-inch TV display diagonal measures 55 × 2.54 = 139.7 centimeters (1.397 meters).
How do I convert a 32-inch waist size to centimeters for clothing shopping?
Multiply 32 by 2.54: 32 × 2.54 = 81.28 cm. A 32-inch waist corresponds to approximately an 81 cm waist size in metric apparel charts.