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Calculate your check digit

The last digit in all GS1 numbers is a check digit.

The check digit is calculated from the preceding digits. It is used as a check for both the GS1 number and the barcode.

Therefore, it is important that the check digit is correct - otherwise the barcode cannot be read.

The check digits are calculated according to the Modulus-10 algorithm

  • Calculate your check digit by entering your number in the calculator.
  • You can enter 7, 11, 12, 13 and 17 digits in the calculator, corresponding to UPC, GTIN-8, GTIN-13, GTIN-14 and SSCC.
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How to get ahead successfully

Not sure how to order GS1ID, get a GLN, create a barcode or similar?

You can find answers to many of the questions we receive most often from members via the button below. You are of course also welcome to contact us.