UPC-A is the 12-digit barcode used widely in the United States and Canada. It is closely related to EAN-13 and read by the same scanners.
UPC vs EAN
UPC-A has 12 digits; EAN-13 has 13. Most modern POS systems read both, but retailers may specify which they require.
Getting valid numbers
For products on shop shelves, obtain a GS1 prefix. The check digit is calculated automatically when you generate the code.
Tip
UPC-E is a compressed six-digit form for small packages where a full UPC-A will not fit.
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