Inches to CM Converter
Multiply the inch value by exactly 2.54 to convert it to centimeters.
1 inch equals exactly 2.54 centimeters.
In the reverse direction, 1 centimeter is approximately 0.393701 inches.
Convert length
Target unit: Centimeter (cm)
Other common results
- Feet
- 0.0833333 ft
- Yards
- 0.0277778 yd
- Inches
- 1 in
- Miles
- 0.0000157828 mi
- Centimeters
- 2.54 cm
- Millimeters
- 25.4 mm
1 inch = 2.54 centimeters
1 in = 2.54 cm
Inches and Centimeters
Inch
An inch is often used for screens, hardware, and dimensions written for US markets. On a ruler it may appear as a fraction, so converting first to a decimal inch can simplify the metric calculation.
Read the inch referenceCentimeter
A centimeter is a decimal metric unit that makes product and body dimensions easy to compare internationally. In this pairing, centimeters translate an inch-based specification into a smaller metric step.
Read the centimeter reference
Understanding the difference
This direction turns a customary measurement into a metric value without using a rounded conversion factor. Because the international inch is defined as 0.0254 meter, multiplying by 2.54 produces an exact centimeter relationship before the uncertainty of the original measurement is considered.
Every whole inch contains exactly 2.54 centimeters.
The inch is customary; the centimeter is a decimal subdivision of the SI meter.
The centimeter is the smaller unit, so the numerical centimeter result is 2.54 times the inch value.
This direction is useful when adapting screen, hardware, print, or product dimensions to metric documentation.
Conversion formula
1 in = exactly 2.54 cm. Multiply the inch value by exactly 2.54 to convert it to centimeters.
Dimensional analysis
14 in × (2.54 cm / 1 in) = 35.56 cm. The inch units cancel, leaving centimeters.
Worked example
Screen diagonal
15.6 × 2.54 = 39.624A 15.6-inch laptop display has a diagonal of exactly 39.624 centimeters before rounding for presentation.
Precision note
The factor 2.54 is exact, but an inch measurement read from a ruler or product listing may not be. Do not add unsupported precision: round the centimeter result to match the reliability of the original inch value.
Inches to Centimeters conversion table
These source values match common measurements for this specific conversion direction.
| Inches (in) | Centimeters (cm) | Copy row |
|---|---|---|
| 0.25 in | 0.635 cm | |
| 0.5 in | 1.27 cm | |
| 1 in | 2.54 cm | |
| 2 in | 5.08 cm | |
| 3 in | 7.62 cm | |
| 6 in | 15.24 cm | |
| 10 in | 25.4 cm | |
| 12 in | 30.48 cm | |
| 15 in | 38.1 cm | |
| 24 in | 60.96 cm | |
| 32 in | 81.28 cm | |
| 48 in | 121.92 cm |
Common values
Frequently asked questions
What is the exact formula for inches to centimeters?
Multiply inches by exactly 2.54. The result is centimeters.
How many centimeters is a 12-inch measurement?
Twelve inches equals exactly 30.48 centimeters.
Does an inch screen size describe its width?
Usually not. Television and monitor sizes generally describe the diagonal, so width also depends on the screen's aspect ratio.
Sources
The calculator reuses Convertora's verified meter-based engine. The comparison, example, FAQ, table values, and precision guidance were edited specifically for this unit direction.
- NIST Special Publication 811 — US guidance for unit symbols, SI usage, and conversion practice.
- NIST SI Units — Plain-language reference for SI base units and exact customary relationships.
- BIPM, The International System of Units (SI Brochure) — The SI definition of the meter and the decimal prefix system.
- Convertora Methodology
- Convertora Editorial Policy