Free Inches to Centimeters Converter
Convert inches to centimeters for screen and TV sizes, clothing and body measurements, paper dimensions, and practical DIY home-improvement tasks.
Pick any units and edit either box — it converts instantly in your browser.
Quick answer
To convert inches to centimeters, multiply by 2.54 (the exact standard conversion). For instance, a 10-inch measurement equals 25.4 centimeters.
Formula & method
centimeters = inches × 2.54
- in — value in inches
- cm — result in centimeters
- 2.54 — exact conversion factor (1 in = 2.54 cm)
To convert back, divide by 2.54 (1 cm = 0.393701 in).
Inches to Centimeters — common values
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 5 in | 12.7 cm |
| 8 in | 20.32 cm |
| 10 in | 25.4 cm |
| 12 in | 30.48 cm |
| 24 in | 60.96 cm |
Examples
- Input
- 1 in
- Result
- 2.54 cm
- Why
- The inch is a traditional unit still widely used in the US and UK for small measurements.
- Input
- 5 in
- Result
- 12.7 cm
- Why
- A typical adult's hand span from thumb to pinky is about 5 to 7 inches.
- Input
- 24 in
- Result
- 60.96 cm
- Why
- A 24-inch screen diagonal is a common size for computer monitors and laptops.
- Input
- 55 in
- Result
- 139.7 cm
- Why
- A 55-inch television is a popular mid-sized screen for living rooms and entertainment.
Common mistakes
- Rounding too early. Multiply by the full factor (2.54) first, then round only the final centimeters value.
- Converting the wrong way. This page goes Inches → Centimeters; to go back, divide by 2.54.
Frequently asked questions
What is the exact conversion from inches to centimeters?
1 inch = 2.54 cm exactly. This is the international standard since the global foot-inch definition was unified in 1959.
How many inches are in a centimeter?
1 centimeter = 0.39370 inches, or approximately 0.4 inches for rough estimates.
Why are screen sizes in inches?
TV and monitor sizes are historically measured in inches because the inch has long been the standard in the electronics and display industry, especially in the US.
What is my height in inches and centimeters?
Measure your height in feet and inches (e.g., 5 ft 9 in = 69 inches total), then multiply by 2.54 to get centimeters. Alternatively, convert feet to meters and multiply by 100.
How do I measure clothing size in inches?
Clothing sizes like waist, inseam, and sleeve length are often given in inches on US brands. Measure with a soft tape measure and convert to centimeters for international or online shopping.
What is the most accurate number of decimal places for inch-to-cm conversion?
For most everyday purposes (clothing, screens), two decimal places (e.g., 12.70 cm) is sufficient. For precision work like manufacturing, use four decimal places.
Sources & references
- NIST Handbook 44 – Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices
- International Organization for Standardization (ISO) – ISO 80000-3 Standard
External references open in a new tab. We are independent and not affiliated with these organizations.
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Provided “as is” for general information only — results may be inaccurate, so verify before you rely on them. No warranty; use at your own risk.
Built and reviewed by HIFreeTools against the formula shown above and any authoritative references cited on this page. See our methodology and editorial standards.
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