Question 1

What is ISBN?

Accepted Answer

ISBN (International Standard Book Number) is a unique identifier for books. ISBN-13 (13 digits) is the current standard; ISBN-10 (10 digits) was used before 2007.

Question 2

Can I use ISBN barcodes on my book?

Accepted Answer

ISBN numbers must be officially assigned by your country's ISBN agency. Generated barcodes are valid for testing and prototyping only.

Question 3

How is the ISBN check digit calculated?

Accepted Answer

ISBN-13 uses the same weighted-sum algorithm as EAN-13. ISBN-10 uses a mod-11 algorithm with weights 10 through 1, producing check digits 0-9 or X.

ISBN Generator

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