GTIN check digit calculator
Check a barcode number, or enter it without its last digit to calculate the check digit. Works for EAN-13, UPC-A, EAN-8 and GTIN-14.
Valid GTIN-13 (EAN-13)
Weighted sum 89. The next multiple of ten is 90, so the check digit is 1.
- As GTIN-14
- 04006381333931
- In a GS1 QR code
- …/01/04006381333931
How the check digit works
The last digit of every GTIN is calculated from the others. Starting from the right, the digits are multiplied by 3, 1, 3, 1 and so on. The check digit is what you add to that sum to reach the next multiple of ten. A scanner repeats the calculation, so a single wrong digit is caught at the till.
Which GTIN do I have?
13 digits: EAN-13. The usual barcode on consumer products outside North America.
12 digits: UPC-A. The usual barcode in the United States and Canada.
8 digits: EAN-8. For small packs with little room for a barcode.
14 digits: GTIN-14. For cartons and cases. In a QR code every GTIN is written as 14 digits.
Turn this number into a QR code that scans at checkout
Backlabel makes GS1 QR codes with your EU e-label behind them. They keep working after you print.
Free for up to 3 products, no card needed.