The last digit of a barcode number is a calculated check digit. The check digit is calculated from all the other numbers in the barcode and ensures the integrity of your barcode number.
Simply enter the ID Number below and the Check Digit Calculator will calculate the last digit for you. For instructions on the ID number or how to use the Check Digit Calculator, click here.
If you prefer to calculate the check digit on your own, click here for instructions.
Or, for all your barcode needs use our online barcode creation tool, Data Driver. It calculates the check digit automatically.