What is the ISSN Validator?
Validate the checksum of an 8-character ISSN. ITS Research Solution keeps the interactive tool above the explanation so you can calculate first and then review the method used.
Formula or method
ISSN uses weighted digits 8 to 2 with a mod-11 check digit.
How to use this tool
Enter the requested values using consistent units, run the calculation and review the main result plus any supporting values. ISSN 2049-3630 can be checked after hyphens are removed.
Interpretation and limitations
Checksum validity does not verify journal identity or indexing status. Always check source data, units, rounding and discipline-specific requirements before using a result in assessed, published, regulated or high-stakes work.
Frequently asked questions
How is this result calculated?
ISSN uses weighted digits 8 to 2 with a mod-11 check digit.
Can I use this result in formal academic or research work?
Use it as a transparent calculation aid, then verify the assumptions, units, rounding and any institution-, journal- or field-specific requirements before formal use.