Length conversion
Inch to Centimetre
One inch is 2.54 centimetres. Enter any value below to convert it instantly, or use the reference table further down for the numbers you need most often.
Conversion rate
1 in = 2.54 cm
cm = in × 2.54
1 in = 2.54 cm
Reference
Inch to Centimetre table
The values people look up most often, rounded for practical use.
| Inch (in) | Centimetre (cm) | Written out |
|---|---|---|
| 1 in | 2.54 cm | 1 inches = 2.54 centimetres |
| 2 in | 5.08 cm | 2 inches = 5.08 centimetres |
| 3 in | 7.62 cm | 3 inches = 7.62 centimetres |
| 5 in | 12.7 cm | 5 inches = 12.7 centimetres |
| 10 in | 25.4 cm | 10 inches = 25.4 centimetres |
| 15 in | 38.1 cm | 15 inches = 38.1 centimetres |
| 20 in | 50.8 cm | 20 inches = 50.8 centimetres |
| 25 in | 63.5 cm | 25 inches = 63.5 centimetres |
| 50 in | 127 cm | 50 inches = 127 centimetres |
| 100 in | 254 cm | 100 inches = 254 centimetres |
| 250 in | 635 cm | 250 inches = 635 centimetres |
| 500 in | 1,270 cm | 500 inches = 1,270 centimetres |
| 1,000 in | 2,540 cm | 1,000 inches = 2,540 centimetres |
How to convert inches to centimetres
Multiply the number of inches by 2.54. That is the whole calculation: cm = in × 2.54. To go back the other way, divide instead, or multiply by 0.3937.
Worked example: 12 inches × 2.54 = 30.48 centimetres.
Where this conversion comes up
Length conversions show up constantly in printing, DIY, engineering drawings and anything bought from a country using the other measurement system. If you are converting in order to set a page or grid size, the graph paper generator accepts spacing in millimetres directly — and the on-screen ruler lets you check a printed result against both scales.
Quick answers
- 1 inch = 2.54 centimetres
- 2 inches = 5.08 centimetres
- 5 inches = 12.7 centimetres
- 10 inches = 25.4 centimetres
- 100 inches = 254 centimetres
More conversions
Other length conversions
Answers
Frequently asked questions
cm = in × 2.54. The converter above applies it for you, but the formula is useful in a spreadsheet — put your value in column A and the formula in column B.Related tools
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