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TheForumSurgeon

UPC barcodes does not produce the correct check digit

I am using your product to generate UPCa barcodes.

I know the data is encoding because I can scan the barcode but the check digit in the barcode and the scanned result is not correct.

The data I am using is:
108515650022 but the check digit comes up as 1. Am I doing something wrong?


07-18-12     2554 day(s) ago    

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Ben

Best Answer

UPCa (GTIN-12) calculates a check digit based off of the first eleven digits of data. Therefore, your data, passed to encoder to generate the check digit, is 1.

image

This is correct for the data 10851565002. You may verify this at the GS1.org Website using their Check Digit Calculator.

Comparing the result from GS1 with IDAutomation products will ensure you that the check number is being properly calculated.

For the actual MOD 10 Calculation, please visit the UPC FAQ.

Posted 2554 day(s) ago

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