GTIN Check Digit Calculator

UPC Bar Code

This free check digit calculator is provided by Bar Code Graphics, Inc.  We are the leading provider of GS1 support services in the US and specialize in barcode creation and identification implementation. Major retailers, manufacturers, ad agencies, and coupon processors utilize our services everyday.

Calculated from the preceding numbers, the last digit of a barcode is the “check digit.”  The free calculator will determine the correct check digit for all forms of GTIN identification.

GS1 barcode compliance doesn’t have to be as hard as reading the 534 page GS1 General Specifications.  While our check digit calculator is a valuable tool, many aspects of assigning and maintaining compliance require a much more substantial resource.

Our GS1 Barcode Support provides personal, comprehensive service to your company.  Clients are assigned a personal consultant for one year, who will assist with UPC barcodes, GTIN-14 assignments, barcode production, and product information. GS1 Barcode Support programs include 1-year access to the GTIN.Cloud global UPC Product Data Repository.  All entered data and GTIN assignments are validated by a GS1 Barcode consultant prior to publishing, since GTINs can never be reused.  

Check digits can be manually entered below:


Our reliance and appreciation for standards enable us to provide our clients best-in-class solutions. Our experience has been lent to major retailers, industry associations, and even GS1 itself. Whether your company is new or established, needs ten UPCs or a hundred thousand, your assigned consultant who will personally coordinate the processes enabling your company to provide accurate item identification and UPC barcodes. GS1 compliance is what we do best – contact us today and see how the GS1 Barcode Service from Bar Code Graphics can help your company confidently do what it does better than anyone else.

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