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This Fact Sheet provides a detailed explanation of how to calculate the Check Digits for the diferent length GS1 Identification Numbers. Note: The Check Digit for a Zero Suppressed GTIN-12 (encoded in a UPC-Ebarcode) is calculated using the first eleven digits of the GTIN-12 in its expanded form.
Use our check digit calculator below to calculate a check digit. What is a check digit? The last digit of all fixed-length, numeric GS1 Identification Keys is a check digit that ensures the integrity of the key. All GS1 ID Keys need a check digit, except Component/Part Identifier (CPID) and Global Individual Asset Identifier (GIAI).
Follow the prompts to download this application to your computer, keeping a record of the location of the saved file, gs1au-check_digit_setup.zip. Allow a few minutes as the file is 5.3 MB. If the Download Complete dialogue box appears, select Open. The file explorer will automatically open.
The Check Digit for a GTIN-12 (U.P.C.) ID Number is figured using the standard modulo calculation. Suppose you want to find the Check Digit for the GTIN-12 (U.P.C.) Number 61414121022. Set up a table with 12 columns, and put the number 61414121022 into Positions One through Eleven.
Download and view these PDF instructions about the ID number and how to use the Check Digit Calculator. If you prefer to calculate the check digit on your own, download and read these PDF instructions (300 KB) .
The check digit is the last barcode number that makes sure the barcode is correctly composed. Find out here how to calculate your check digit manually.
Calculating your check digit The calculation is used to create the check digit for all the GS1 Identification Keys that require them, including GTINs and GLNs.
