How to use Inches to CM
- Type a value in inches.
- The result in centimeters appears instantly.
- Type in the second box to convert the other way.
How to convert inches to centimeters
Multiply the value in inches by 2.54. Formula: cm = in × 2.54. Example: 10 in × 2.54 = 25.4 cm.
Common inches to centimeters conversions
5 in = 12.7 cm. 25 in = 63.5 cm. 50 in = 127 cm. 100 in = 254 cm.
Quick mental math
Quick estimate: multiply by 2.5. 10 inches ≈ 25 cm (exact: 25.4 cm).
Where is in to cm conversion used?
Length conversions come up constantly when metric and imperial systems meet: checking your height for a visa or medical form, comparing screen and TV sizes, buying furniture or clothes from another country, reading product dimensions on international shopping sites, and following DIY or engineering drawings.
What are inches?
An inch is exactly 2.54 centimeters by international agreement. It is used in the US and UK for screens, height and small dimensions.
What are centimeters?
A centimeter is one hundredth of a meter. It is the everyday metric unit for height, clothing sizes and object dimensions in most countries.
Inches to centimeters conversion 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 |
| 12 | 30.48 |
| 15 | 38.1 |
| 20 | 50.8 |
| 25 | 63.5 |
| 30 | 76.2 |
| 50 | 127 |
| 75 | 190.5 |
| 100 | 254 |
Frequently asked questions
How many centimeters are in 1 inch?
1 inch = 2.54 centimeters (1 in = 2.54 cm).
How many inches are in 1 centimeter?
1 centimeter = 0.393701 inches (1 cm = 0.393701 in).
What is 10 in in centimeters?
10 in = 25.4 cm.
What is 100 in in centimeters?
100 in = 254 cm.
Is the in to cm conversion exact?
Yes. Since 1959 the inch has been defined as exactly 2.54 cm, so every imperial–metric length factor (inch, foot, yard, mile) is exact. Results here are rounded only for display.
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