Barcode Check Digit Calculator
Calculate or verify the check digit for EAN-13, UPC-A and EAN-8 barcodes.
Inputs
Results
Enter your numbers and the results appear here instantly.
What is the barcode check digit calculator?
The last digit of a retail barcode is a checksum calculated from the digits before it, which scanners use to catch misreads. Enter the first 12 digits of an EAN-13 (or 11 of a UPC-A, 7 of an EAN-8) and this tool returns the correct final digit — or paste a full barcode to validate one you have been given before it reaches a printer.
How to use it
- 1Enter your barcode digits.
- 2Press Generate. Results update instantly, so you can change a number and compare.
- 3Save the result to your account if you want to come back to it later.
Frequently asked questions
- Is the Barcode Check Digit Calculator free to use?
- Yes. The Barcode Check Digit Calculator is free, unlimited and does not require an account. Creating a free account only adds favourites, saved results and history.
- Is my data sent anywhere?
- No. Everything runs in your browser — your figures never leave the device unless you choose to save a result to your account.
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