What is the main difference between EAN-13 and UPC-A?

UPC-A encodes 12 digits (11 data + check digit) common in North America. EAN-13 encodes 13 digits and is standard in Europe, Asia, and most other markets. The bar patterns are related but not interchangeable on packaging specs.

Can I convert UPC to EAN by adding a zero?

Often yes for the numeric GTIN, but you must regenerate barcode artwork as EAN-13 and meet that symbol’s sizing rules. Do not assume a UPC image scaled wider qualifies as EAN.

Which format does Amazon require?

Requirements vary by marketplace region. North American listings typically expect UPC-A; many European listings expect EAN-13. Always check the seller portal for the target country.

Do EAN and UPC share check digits?

They use the same GS1 mod-10 algorithm on the GTIN, but the digit string length differs, so the check digit calculation input changes. Use a generator that computes it automatically.

Can I use EAN-8 instead?

EAN-8 is for very small packages that cannot fit a full EAN-13. It still requires a properly assigned GTIN-8 from GS1, not a truncated EAN-13.

Where do I learn about GTIN ownership?

Read GS1 basics for company prefixes, licensing, and how GTINs stay unique worldwide.

EAN vs UPC: Which Retail Code?

EAN-13 and UPC-A are sibling retail barcodes that encode Global Trade Item Numbers for point-of-sale scanning. EAN-13 is dominant outside North America; UPC-A is the default in the United States and Canada. Generate each format in the EAN-13 generator and UPC-A generator, then test with Barcode Scan.

Why it matters

The two symbols look similar—a vertical bar pattern with digits beneath—but digit count and leading-zero rules differ. Ship the wrong one and Amazon, Walmart, or regional grocers reject your listing even if the underlying product ID is correct. Because many scanners treat UPC-A as a subset of EAN-13, confusion rarely breaks checkout, but packaging artwork and marketplace forms still demand the precise symbology.

EAN-13 and UPC-A bar width patterns compared

How to apply it

Obtain a legitimate GTIN from your GS1 prefix before generating artwork. For U.S. shelves, build UPC-A with 12 data digits plus a check digit. For most international retail, use EAN-13 with 13 digits. Validate the check digit using our check digit guide and confirm GS1 ownership in GS1 basics.

Register GTINs at the correct packaging level—consumer unit, multipack, or case—not just the SKU you think of first.
Never invent a company prefix; marketplaces verify GTIN ownership against GS1 databases.
Print the symbology your target retailer specifies, even if scanners might read the other format.
Keep barcode magnification within GS1 size guidelines so laser checkout guns decode reliably.

Common mistakes

Teams frequently pad UPC numbers to fake an EAN-13 by adding a leading zero without updating artwork dimensions—fine for data, but sloppy for brand compliance. Another error is reusing a GTIN across visually different products; that triggers chargebacks. If you export to multiple regions, plan separate label variants rather than one “global” barcode that violates local listing rules.

Retail package showing GTIN barcode placement

Recommended tools

Compare outputs in the EAN-13 and UPC-A tools, browse the full Barcode Generator hub, and verify scans in Barcode Scan before sending files to your label printer.

Why it matters

How to apply it

Common mistakes

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