Finance

GTIN Check Digit Calculator

Calculate or verify the check digit for UPC, EAN, and GTIN barcodes.

GTIN Code (without check digit)

Enter 7 (EAN-8), 11 (UPC-A), 12 (EAN-13), or 13 (GTIN-14) digits

Algorithm:
1. Multiply digits alternately by 1 and 3 (from right)
2. Sum all products
3. Check digit = (10 − (sum mod 10)) mod 10

GTIN Barcode Types