Convert ISBN-10 to ISBN-13, ISBN-13 to ISBN-10, validate ISBN numbers, calculate check digits, remove hyphens, format results, and copy clean book identifiers instantly.
Useful for authors, publishers, librarians, students, sellers, catalog managers, and book database cleanup.
Enter an ISBN-10 or ISBN-13 number and convert it to the other format with validation.
ISBN-13 = 978 + first 9 digits of ISBN-10 + new ISBN-13 check digit
This ISBN is valid and can be converted to ISBN-13.
Books may use ISBN-10 or ISBN-13 identifiers. This converter helps clean, validate, and convert book numbers quickly.
Convert older 10-digit ISBN numbers into modern 13-digit ISBN format with a correct check digit.
Convert eligible 978-prefixed ISBN-13 numbers back into ISBN-10 format when possible.
Check whether an ISBN number is valid by verifying length, allowed characters, and check digit.
ISBN conversion changes a book identifier from ISBN-10 to ISBN-13 or from ISBN-13 to ISBN-10. ISBN-10 uses 10 characters, while ISBN-13 uses 13 digits and is commonly used with book barcodes.
This tool removes spaces and hyphens, checks the ISBN structure, validates the check digit, and creates the matching converted ISBN when conversion is possible.
| Input | Type | Converted Result |
|---|---|---|
| 0306406152 | ISBN-10 | 9780306406157 |
| 9780306406157 | ISBN-13 | 0306406152 |
| 0-306-40615-2 | Formatted ISBN-10 | 9780306406157 |
| 097522980X | ISBN-10 with X | 9780975229804 |
Convert ISBN numbers in three simple steps.
Paste an ISBN-10 or ISBN-13 number with or without hyphens.
The tool removes formatting and checks the ISBN check digit.
Get the converted ISBN, formatted output, check digit, and validation status.
Common questions about converting ISBN-10 and ISBN-13 numbers.