ISBN-10 / ISBN-13 Converter

Hyphens or spaces within ISBN numbers are for readability and can be omitted.

ISBN-10 and ISBN-13 background

  • The International ISBN Agency introduced the new ISBN-13 format in 2007.
  • Prior to 2007, the ISBN format was 9 digits plus one check character (either a digit or an X). This older format is now known as ISBN-10.
  • Starting in 2007, the ISBN format is identical to that of an EAN-13 Universal Product Code. It consists of 12 digits (starting with 978 or 979) followed by a single check digit. This is referred to as an ISBN-13. On most books it matches the barcode printed beneath the ISBN number.
  • It is only possible to convert ISBN-13 to ISBN-10 if the number starts with 978.
  • In some countries there may be an additional barcode to the right of the ISBN barcode which gives the suggested retail price for the book: in other countries this recommended pricing is illegal.
  • The full specification of an ISBN-13, specifying how the number is split between Prefix Element, Registration Group Element, Registrant Element, Publication Element, and Checksum (along with details of the checksum calculation) can be found in the ISBN User's Manual.
© Albion Research Ltd. 1993-2021
14ac1c0
Need Better Web Hosting?

Can we suggest you look at some of the companies we've used?


Virtual private servers from only $5/month. Good for serious web apps. Can also be rented by the hour to test out your ideas.


Note: the above are affiliate links to companies we've used. Signing up using these links helps pay for the cost of this page.