Barcode Check Digit Calculator

Every EAN, UPC and GTIN number ends with a check digit that catches typing mistakes. Enter the digits without the last one to calculate it, or enter the full number to check that it is valid.

How to use Barcode Check Digit Calculator

1. Choose the barcode type.
2. Enter the digits without the check digit to calculate it, or the full number to verify it.
3. Copy the completed number.

Frequently asked questions

How is the check digit calculated?

Digits are weighted alternately by 3 and 1 from the right, added up, and the check digit is the amount needed to reach the next multiple of 10 (the GS1 method).

Does a valid check digit mean the product number is registered?

No. It only shows the number is correctly formed. Registered numbers come from GS1 or your national GS1 organisation.

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