What Is a Check Digit in a Barcode Number?
What Is a Check Digit in a Barcode Number?
The check digit is the final digit of a UPC or EAN barcode number. It is mathematically calculated using the digits that come before it. The purpose of the check digit is to:
- Verify that the barcode number is valid
- Detect common scanning or typing errors
- Prevent invalid barcode data from entering retail systems
If the check digit does not match the calculated value, the barcode will fail validation in many retail systems. Speedy Barcodes automatically generates barcode numbers with the correct check digit to ensure proper scanning and compliance.
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