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Check Digit Calculator

The following check digit calculator is provided by Bar Code Graphics, Inc., the leading provider of GS1 support services in the US and specialize in barcode creation and identification implementation. Our services are utilized by the major retailers, manufacturers, ad agencies and coupon processors. In addition, our online barcode web service is the only software to receive GS1 US certification for digital barcode artwork. Please call us at (800) 662-0701 for assistance.

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Our GS1 Barcode Support provides personal, comprehensive service to your company.  Clients are assigned a personal consultant who will assist with UPC barcodes, GTIN-14 assignments, barcode production, and product information. Click on the image below to view a tutorial video to learn how Bar Code Graphics can enable your company to get UPCs and GTIN-14s for on your products.


The last digit of a barcode is called a “check digit”. A check digit ensures that the barcode is correctly composed. To calculate your check digit, use our easy calculator below. Simply enter the first numbers for the barcode you wish to create a check digit.




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Identification Labs is the barcode testing and certification division of Bar Code Graphics. With Bar Code Graphics deep rooted history in barcode origination and the printing industry, Identification Labs provides unparalleled evaluation and support for linear and 2D barcode verification.

Our testing division integrates and applies relevant barcode standards and industry best practices within our clients and partners’ supply chains. Identification Labs is the largest North American barcode testing center for barcode symbols, and our web-based testing programs is utilized by several of the largest U.S. retailers and manufacturers. In addition to supporting GS1 standards for the compliance of many US retailers, Identification Labs provides services to the Automotive and the Electrical Component Industry Association.