ISBN Converter


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  2. ISBN Converter

Converts between ISBN10 and ISBN13 codes. Entering an ISBN10 will result in an ISBN13, entering an ISBN13 will result in an ISBN10. Please enter ISBN-10 or ISBN-13 on each line.
※Hyphens (-) are optional.
※979 is not supported.




input ISBN-10 ISBN-13

About converting between ISBN-10 and ISBN-13

ISBN (International Standard Book Number) is an internationally standardized identification number assigned to publications such as books and magazines. The old format of ISBN was 10 digits (ISBN-10), but since 2007, the new format of 13 digits (ISBN-13) has become the mainstream.

In the ISBN converter, you can convert between ISBN-10 and ISBN-13. The entered ISBN can be either 10 or 13 digits and may or may not contain hyphens.

Conversion from ISBN-10 to ISBN-13

We will extract the first 9 digits from ISBN-10
We will add '978' at the beginning
We will calculate and add the check digit for the new 13-digit ISBN

Conversion from ISBN-13 to ISBN-10

Removing the prefix '978' and the trailing check digit from ISBN-13
Calculating a new check digit for the remaining 9 digits and adding it



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