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Check Digit Calculator

The following check digit calculator is provided by Bar Code Graphics, Inc., the largest US testing center for coupon, POS and logistical barcodes. 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. 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 for.




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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.