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VENDORCOMPLIANCE.INFO

Specializing in EDI and vendor compliance for manufacturers, distributors, &  retailers.

Online Check Digit Calculator

A barcode's check digit is typically the right-most digit in a barcode made up of all numbers, such as the UPC.  The check digit is calculated based upon the other numbers in a barcode.  Different barcodes, (i.e. UPC, SCC-14, UCC-128, etc.) have different check digit calculations.

The Uniform Code Council offers a great check digit calculator on their web site.  The link is:

http://www.uc-council.org/ean_ucc_system/education_support/cdc.html

Plus, this page includes the check digit calculation formula for the various types of barcode check digit calculators listed at the top of the page.  The calculation formula can be used if you are looking to include automatic check digit calculations in your program code.  The site does not include any program code - just the calculation formula which you will write in your programming language of choice.