Check digit calculator

Use our free tool to calculate your check digit.
Calculate check digit

When you calculate a check digit for GTIN-8, GTIN-12, or GTIN-13, the GS1 number will be 14 digits. All 14 digits should be included if you save the number in a database as well as in GS1-128 or GS1 DataMatrix, but the leading zeros should not be included in the barcodes EAN-8 or EAN-13.

Please note that the GS1 numbers you calculate here are neither saved nor registered.

Click here to calculate the check character pair for the GMN (Basic UDI-DI)

To calculate the check digit for one number, type 1 in the field “Ammount of numbers”, or use the calculator on GS1’s Global website, where you also can calculate the check digit for other GS1 keys.