justyourconvertInches to CM
Inches in, centimeters out, using the exact 2.54 factor.
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Inches to cm
Convert inches to centimeters: multiply by 2.54
1 inch = 2.54 centimeters
Formula: cm = in × 2.54
Inches to centimeters table
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 6 | 15.24 |
| 7 | 17.78 |
| 8 | 20.32 |
| 9 | 22.86 |
| 10 | 25.4 |
| 15 | 38.1 |
| 20 | 50.8 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
Calculated on your device with exact factors from NIST and the SI.
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How to convert Inches to cm
Three steps, all in your browser.
- 1
Type a number
Enter a value in either box; the other updates instantly.
- 2
Pick the units
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- 3
Copy the result
Copy the answer or read it off the conversion table.
Inches to CM: what to know
Inches measure screens, TVs, tires, wrenches, waistbands and lumber across the United States, while most of the world reads lengths in centimeters. To convert inches to centimeters, multiply by 2.54. A 15.6-inch laptop screen is 39.62 cm diagonally, and a 32-inch waist is 81.28 cm.
The factor is not a rounded approximation. The international inch was fixed at exactly 2.54 cm by the 1959 international yard and pound agreement between the US, UK, Canada, Australia, New Zealand and South Africa, and NIST still uses that definition. Because the factor is exact, inches to cm results are exact too: 12 inches is 30.48 cm and 36 inches is 91.44 cm, with nothing lost to rounding.
Inch measurements often arrive as fractions. Convert the fraction to a decimal first (3/4 = 0.75, 5/16 = 0.3125), add the whole inches and multiply the total by 2.54. 10 3/4 inches is 10.75 × 2.54 = 27.305 cm. For feet and inches, multiply the feet by 12 and add the inches before converting.
Popular uses
- Converting TV, monitor and phone screen sizes
- Reading US clothing sizes such as waist and inseam
- Converting furniture and appliance dimensions for a room plan
- Turning an inch-based pattern or drawing into metric
Tips for the best result
- Screen sizes are diagonal; width and height depend on the aspect ratio.
- Round to one decimal (millimeters) for most household measurements.
- Use the inches to mm page for small parts and tools.
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