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Length Converter
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Inch to Centimetre Converter
Converts inch to centimetre instantly. One inch equals 2.54 centimetre. Includes a reference table and the reverse conversion.
Converters
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Enter a value to convert.
In short
One inch equals 2.54 centimetre. To convert inch to centimetre, multiply by 2.54. To go the other way, multiply centimetre by 0.3937007874. So 5 inch is 12.7 centimetre, 10 is 25.4 and 100 is 254. Both units measure length and distance, so the conversion is a single exact multiplication with no offset — the same factor works in a spreadsheet or in code. American and Canadian spelling writes this inch to centimeter; it is the same unit and the same factor.
How to use the Inch to Centimetre Converter
- Type the value you want to convert.
- Pick the unit you are converting from and the unit you want.
- The converted value and the exact conversion factor are shown instantly.
About the Inch to Centimetre Converter
The Inch to Centimetre Converter converts inch to centimetre instantly. One inch equals 2.54 centimetre. Includes a reference table and the reverse conversion. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Converting a single inch figure without opening a spreadsheet.
- Checking a specification written in inch against equipment rated in centimetre.
- Getting the factor itself so you can reuse it in a formula.
Details
| 1 Inch | 2.54 Centimetre |
|---|---|
| 1 Centimetre | 0.3937007874 Inch |
| Conversion type | Exact multiplication — no offset needed |
| Measures | Length and distance |
The maths behind it
This tool uses centimetre = inch × 2.54, because both units are defined against the Metre. Every intermediate value is shown on screen, so the result can be checked by hand.
Frequently asked questions
Is it spelled centimetre or centimeter?
Centimetre is the British and international spelling and centimeter is the American and Canadian one. They are the same unit, so 1 inch is 2.54 centimetre however it is written.
Is the Inch to Centimetre Converter free, or is there a paid tier?
Free, unlimited, and no email address required. You can use it a hundred times a day and nothing changes.
Can you see what I put into this page?
No. The Inch to Centimetre Converter runs entirely in your browser using JavaScript. Because the work happens locally, the page also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
How is the result calculated?
It uses centimetre = inch × 2.54, because both units are defined against the Metre. The full working is printed under the result, so you can follow every step rather than trusting a black box.
What do I get if I try it?
Enter 10 inch and the Inch to Centimetre Converter returns 25.4 centimetre.
What do people use the Inch to Centimetre Converter for most?
The jobs it is built for: converting a single inch figure without opening a spreadsheet. Checking a specification written in inch against equipment rated in centimetre. Getting the factor itself so you can reuse it in a formula. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
What are the key numbers for the Inch to Centimetre Converter?
1 Inch is 2.54 Centimetre. 1 Centimetre is 0.3937007874 Inch. Conversion type is Exact multiplication — no offset needed. These are printed on the page itself, so you do not have to take them on trust.
Can I rely on this for exact work?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.
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